[Solved] New build set-up: AMD

Decided to go from an i7 build to this, not quite the same, but the i7 build was a fantasy. I would never be able to come close to using its full potential. Would like some suggestions on the build. I'm a little concerned that the mobo might be a bottleneck, that my gpu is overkill and do I really need an HSF (I DO plan to overclock, so I'm leaning to yes. Thanks in advance

Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
Item #: N82E16822136319
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$74.99


ASUS VH226H Black 21.5" 2ms(GTG) HDMI Widescreen LCD Monitor - Retail
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$169.99


ASUS EAH4870 DK/HTDI/1GD5 Radeon HD 4870 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
Item #: N82E16814121291
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$159.99
$149.99


Saitek PZ30AU Black USB Standard Eclipse Keyboard - Retail
Item #: N82E16823175103
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$49.99
$37.99


Arctic Silver 5 Thermal Compound - OEM
Item #: N82E16835100007
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$6.99


AMD Phenom II X3 720 2.8GHz Socket AM3 95W Triple-Core Black Processor Model HDZ720WFGIBOX - Retail
Item #: N82E16819103649
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-$20.00 Instant
$139.00
$119.00


Scythe MUGEN-2 SCMG-2000 120mm Sleeve CPU Cooler - Retail
Item #: N82E16835185093
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$36.99
1

Scythe SY124010L Fans - Retail
Item #: N82E16835185039
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$3.49
$0.00


CORSAIR CMPSU-550VX 550W ATX12V V2.2 SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power ... - Retail
Item #: N82E16817139004
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LG DVD Burner Black SATA Model GH22NS50 - OEM
Item #: N82E16827136167
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$136.98
$111.98


GIGABYTE GA-MA785G-UD3H AM3/AM2+/AM2 AMD 785G HDMI ATX AMD Motherboard - Retail
Item #: N82E16813128395
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CORSAIR XMS2 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) Desktop Memory Model TWIN2X4096-8500C5C G - Retail
Item #: N82E16820145247
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-$10.00 Combo
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$154.98
$144.98


Microsoft Windows Vista Home Premium SP1 64-bit for System Builders w/ Tech Guarantee - OEM
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Antec Three Hundred Illusion Black Steel ATX Mid Tower Computer Case - Retail
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looks good but where is the ram

Took off the psu/optical drive combo, apparently the LG model has some sort of firmware. Went with the Corsair 550 and a Samsung optical drive. Only $7 more, so I'm happy.

My order didn't go through so`I`switched out the mobo and`the RAM to:
CORSAIR XMS3 DHX 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model TW3X4G1600C9DHX - Retail
Item #: N82E16820145200
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ASUS M4A785TD-V EVO AM3 AMD 785G HDMI ATX AMD Motherboard - Retail
Item #: N82E16813131398
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