About to purchase a new system, Is this a good set-up??????

Case ( Thermaltake Armor Gaming Case w/25cm Fan Side Panel Windows, 420W Power Supply Black )
Processor ( [=== Quad Core ===] Intel Core 2 Quad Processor Q6600 (4x 2.4GHz/8MB L2 Cache/1066FSB) )
Processor Cooling ( CoolerMaster Liquid CPU Cooling Fan System Kit )
Motherboard ( eVGA NForce 680i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0 Dual PCI-E MB )
Memory ( 2048MB [1024MB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand )
Video Card ( EVGA 8800GTX 768MB w/DVI + TV Out Video )
Hard Drive ( 320 GB HARD DRIVE [Serial-ATA-II, 3Gb, 7200 RPM, 16M Cache] )
CD/DVD Drive ( 18X Dual Format/Double Layer DVD±R/±RW + CD-R/RW Drive Black )
Operation System ( Microsoft Windows Vista Home Premium + [Free 60-Day !!!] Microsoft Office 2007(Word, Excel, Outlook, PowerPoint, Access ....) 32-Bit )

Should I get 32bit Vista because its compatible or 64bit Vista because it can run 4gb ram+?????

About to buy system, ANY INPUT AT ALL WOULD HELP.

PSU needs to be better
CPU is good choice
Liquid cooler sucks
eVGA board is wasted if you arent SLIing get intel P35 for single GPU's
Ram is ok Patriot and Crucial are worth a look
GPU is good
hard drive is small better GB/$ can be had elsewhere

Most people will opt for the 32bit OS, but I'm probably leaning towards the 64bit arena. 32bit support from M$ is here to stay, but if your going to get something now, I'd favor the 64bit OS. If you already have a copy of xp that you could use, you could dual boot with it.

Here are some options to consider, if you can order these.

PSU - $100 shipped - $45 MIR (if you trust MIR's) = $55!! can’t beat for this price
Antec NeoPower NeoHE 550 ATX12V 550W Power Supply 100 - 240 V UL, CUL, TUV, CE, FCC, CCC, CB, C-tick – Retail
http://www.newegg.com/Product/Prod [...] 6817103941

Any of these Memory options will suit you just fine, even if you don't get the MIR's.
Memory - $97 shipped - $40 MIR = $57 Good OC’ing RAM for good money!
OCZ Platinum Revision 2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory – Retail
http://www.newegg.com/Product/Prod [...] 6820227139

Memory - $102 shipped - $40 MIR = $62!! Solid performing CAS 4 DDR2
CORSAIR XMS2 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory – Retail
http://www.newegg.com/Product/Prod [...] 6820145034

Memory - $110 shipped - $47 MIR = $63!! Good OC’ing RAM + CAS 4 too.
Crucial Ballistix 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory – Retail
http://www.newegg.com/Product/Prod [...] 6820146565

Memory - $93 shipped - $30 MIR = $63!! CAS 4 and good RAM
GeIL 2GB (2 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory - Retail
http://www.newegg.com/Product/Prod [...] 6820144062

Memory - $96 shipped - $40 MIR = $56!!
OCZ OCZ2P800R22GK 2GB Kit DDR2 PC2-6400 Platinum Revision 2 Dual Channel Memory Retail ***Free Shipping***
http://www.zipzoomfly.com/jsp/Prod [...] 264&ps=ho1

oh yeah, vista sucks! Why do you think microsoft (evil empire) is now offering a downgrade to xp for unhappy vista victims?
Don't do it. At least wait for service pack 1, unless you don't want sound, video, compatability, etc...

Unfortunately I'm not building my comp and Ibuypower is only giving me theses options for which are pretty much ****.... But If you were planning for sli in the future and upgrades which supply would you chose?
Standard Case Power Supply [- $57]
500 Watt -- NZXT PF-500 Power Supply [- $30]
550 Watt -- Power Supply SLI Ready [- $5]
600 Watt -- Power Supply SLI Ready
600 Watt -- XION SuperNova XON-600R14 Power Supply [+ $11]
650 Watt -- NZXT PRC-650 Power Supply SLI Ready [+ $35]
[$30 OFF Mail-In Rebate] 750 Watt -- Thermaltake Toughpower W0117RU Power Supply Quad SLI Ready [+ $105]
800 Watt -- NZXT PP-800 Power Supply [+ $65]
800 Watt -- XION SuperNova XON-800F14R Power Supply [+ $46]
850 Watt -- NZXT PRC-850 Power Supply Quad SLI Ready [+ $111]
[$40 OFF Mail-In Rebate] 850 Watt -- Thermaltake Toughpower W0131RU Power Supply Quad SLI Ready [+ $150]
1000 Watt -- NZXT PRC-1000 Power Supply Quad SLI Ready [+ $165]
[$40 OFF Mail-In Rebate] 1000 Watt -- Thermaltake Toughpower
W0132RU Power Supply Quad SLI Ready [+ $195
1200 Watt -- NZXT PRC-1200 Power Supply Quad SLI Ready [+ $215]
1200 Watt -- Thermaltake Toughpower W0133RU Power Supply Quad SLI Ready [+ $235]

Also since you guys didn't like my cpu cooling choice there are only 2 others

CoolerMaster Liquid CPU Cooling Fan System Kit [+ $48]
[=== Silent ===] Extreme-Performance INTEL CPU Cooling Fan System Kit Silent & Overclocking Proof = Maximum cooling efficiency for quietness and performance [+ $9]
[$10 OFF Mail-In Rebate] [=== Silent ===] Thermaltake MaxOrb CPU Cooling Fan System Kit Silent & Overclocking Proof = Maximum cooling efficiency for quietness and performance [+ $39]

Here are the motherboards

Asus P5N-E SLI nForce® 650i SLI Chipset w/6-channel CODEC, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394 Dual PCI-E MB
Asus P5N32-E SLI nForce® 680i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394 Dual PCI-E MB [+ $138]
[New !!!] Asus Striker Extreme nForce® 680i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0, IEEE-1394 Dual PCI-E MB [+ $227]
eVGA NForce 680i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA Raid, USB 2.0 Dual PCI-E MB [+ $47]
[$15 OFF Mail-In Rebate] MSI P35 Neo-F P35 Chipset w/7.1 Sound, Gb LAN, S-ATA, USB 2.0 PCI-E MB [- $10]
MSI P6N SLI-F nForce 650i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA, USB 2.0, IEEE 1394, PCI-E MB [- $5]
MSI P6N Diamond nForce 680i SLI Chipset w/7.1 Sound, Gb LAN, S-ATA, USB 2.0, IEEE 1394, PCI-E MB [+ $178]

And finally the ram selection

512 MB [512MB X1] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand More Options [- $108]
Corsair-Value or Major Brand
Mushkin [+ $5]
1024MB [512MB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand More Options [- $90]
Corsair-Value or Major Brand
Mushkin [+ $3]
Corsair XMS2 Xtreme w/Heat Spreader [+ $20]
Mushkin Xtreme w/Heat Spreader [+ $27]
2048MB [1024MB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand More Options
Corsair-Value or Major Brand
Mushkin [+ $15]
Corsair XMS2 Xtreme w/Heat Spreader [+ $50]
Mushkin Xtreme w/Heat Spreader [+ $60]
4096MB [1024MB X4] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand More Options [+ $200]
Corsair-Value or Major Brand [+ $290]
Corsair XMS2 Xtreme w/Heat Spreader [+ $390]
Mushkin Xtreme w/Heat Spreader [+ $415]
4096MB [2048MB X2] DDR2-800 PC6400 Memory Module Corsair-Value or Major Brand More Options [+ $350]

Anyways I know the parts are not the best on this website but I would appreciate your opinions on which MobBo,Ram,Cpu cooler and power supply out of these options of the best value and quality, Thanks!

Of the PSUs listed, only the Thermaltakes are worth considering. The others all live on "do not buy" Tier-5.
Otherwise, I agree with chookman's summary, and Zorg's advice.
Oh, and buzznut's too. To call: going from something that doesn't work to something that does, a "downgrade," is just Microsquishy marketing horsepoo.

Dude, buy somewhere else or build your own.