[drterrible]

I was wondering if I could get some building advice. I have never built a computer before and thought I would give it a go. These are the parts I am going to order, I have not decided on a GPU as I don't know what would be good so any help would be great.

Gigabyte X58A-UD7 ATX LGA1366 X58 DDR3 4PCI-E SATA6GB USB3.0 2GLAN 3-WAY CrossFireX SLI Motherboard

Thermalright Ultra 120 Extreme 6 Heatpipe Cooler AM2 Heatsink 120MM Fan 1000RPM 15.8DBA 38.9CFM

Western Digital Caviar Black 500GB 7200RPM 32MB Dual Proc SATA 3.5IN Hard Drive OEM 5YR MFR Warranty

Corsair TX850W 850W CMPSU-850TX 12V 70A 24PIN ATX Active PFC 140M Fan Power Supply

Corsair XMS3 CMX6GX3M3A1600C9 6GB DDR3 3X2GB DDR3-1600 CL 9-9-9-24 Core i7 Memory Kit

I7-920 D0 CPU
Coolermaster HAF 922 ATX Case

If you think something could be better, or if I'm missing something, any advice would be great.