Yes....3 PCI-16 cards ? Liquid Cooling ? 30% aging too big
Processor: Intel i7 920 - Great Choice
Motherboard: ASUS P6T SE - Good Choice
RAM: CORSAIR XMS3 DDR3 - 1600 (Timing: 8-8-8-24, Voltage 1.65) - Overpiced
HD: Seagate 7200 rpm 750 GM - too old
2nd HD: Seagate 7200 80 GB - too old
Monitor, keyboard and mouse: Already have
Go to newegg site and hit computer hardware dropdown and lets drill down as follows:
Memory
Desktop memory
240 pin DDR3
DDR1600
6 GB (3 x 2GB)
CAS 7 latency
There'a nice set of Mushkin for $180ish......If that breaks budget, hit the back button and choose CAS8....Sort list on Best price and we find a set of OCZ w/ 8-8-8-24 for $119 and ya save $50
Hard drives : The WD Black 2 TB model has 500 GB platters but all other blacks have smaller ones. So if not going for 2 TB, only choices are Spinpoint F3 or Seagate 7200.12 ...F3's a bit faster....7200's a lot quieter and cooler.
-Power supply - avoid judging PSU's on brand name or wattage alone. The most important criteria is "brand + series". Though the different lines may have same name on them each "line" is generally made by a different outside OEM. For example, the Antec SG series is amde by Delta.....the other lines by anothe rmanufacturer. The Antec SG (or CP) and Corsair HX lines represent the cream of the crop, next tier down is the Antec TP / Corsair TX.
I get about 500 watts from the stuff you selected....adding 20% cushion would put you at 600 watts
Looking here:
http://www.silentpcreview.com/Recommended_PSUs
the Editor's Choice options are:
Enermax Modu82+ 625W ($129)
Antec Signature SG-650 ($219) this would be my choice except for price.....my SG-850 is also $219!
Seasonic X-650 ($179)
Antec CP-850 ($124) - bigger than you need but top end Pu and bargain price.
Others I'd consider are TX-650 or 750 ($89) and TP-650 ($99)
-Video card - The 9800 GTX you picked should be fine
-cooler - Prolimatech Megahalems top notch cooler with extremely easy installation procedure. Add a Enermax PWM cluster fan (or 2)....newegg doesn't carry. reviews below
http://www.silentpcreview.com/Recommended_Heatsinks
http://benchmarkreviews.com/index.php?option=com_content&task=view&id=371&Itemid=62&limit=1&limitstart=15
http://www.frostytech.com/top5heatsinks.cfm
Can buy the stuff here:
http://www.frozencpu.com/products/8807/cpu-pro-01/Prolimatech_Megahalems_Rev_B_Intel_CPU_Heatsink_LGA_775_1156_1366_AM2_AM2_AM3_Hot_Item.html?tl=g40c14s757
http://www.frozencpu.com/products/7038/thr-41/Innovation_Cooling_Diamond_7_Carat_Thermal_Compound_-_15_Grams.html
http://www.frozencpu.com/products/7489/fan-437/Enermax_Cluster_120mm_x_25mm_LED_PWM_Fan_w_Twister_Bearing_Technology_-_White_UC-CL12.html?tl=g36c365s936
-case - Antec 900 / 902 or if you want room for expansion an Antec 1200. The Antec 1200 also fits the Antec CP-850 PSU which is an extreme bargain @ $124. Can turn LED's off if you wanna be more understated. If ya don't like Blue or the Antec styling, I'd say go for the red and HAF 922 / 932.