Build Advice

[Fiddler]

So this is what I have put together so far. Dose it all look compatible and do you know of a cheaper, but just as good version of anything I have listed? Will the 650w PSU run this ok or should I get a bigger or smaller one. Keeping in mind I may get another 6870 and crossfire in the future. Basically, what size PSU I need is my biggest concern.

AMD Phenom II X4 955 Black Edition Deneb 3.2GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Quad-Core Processor

ASRock 870 EXTREME3 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard

SAPPHIRE 100314-2SR Radeon HD 6870 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity

CORSAIR Enthusiast Series CMPSU-650TX 650W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800)

SAMSUNG Spinpoint F3 HD103SJ 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

LITE-ON CD/DVD Burner - Bulk Black SATA Model iHAS124-04 - OEM

Antec Dark Fleet DF-10 Black SECC ATX Mid Tower Computer Case

Antec 75003 120mm Case Fan

COOLER MASTER Hyper 212 Plus RR-B10-212P-G1 "Heatpipe Direct Contact" Long Life Sleeve 120mm CPU Cooler Compatible Intel Core i5 & Intel Core i7

Microsoft Windows 7 Home Premium 64-bit 1-Pack for System Builders - OEM

[RickyTick]

Looks good.

You might consider this psu to help future proof your system.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021

[Fiddler]

Thank you RickyTick

The budget for my build is around $800, and that psu put me at $905. Could you suggest a case that would be cheaper and you think would hold all of those parts comfortably and keep them cool. Looks are not important. Also, would there be much of a performance drop off if I was to switch from the 6870 to the 6850?

I might also add, that this computer is mainly going to be a Internet and MMO gaming computer.

[RickyTick]

MMO's are near as demanding as FPS games. You could use the 6850 and be fine.
You could also go with a case and psu combo like this. http://www.newegg.com/Product/Product.aspx?Item=N82E16811129065
I built a system with this a couple of months ago. It's really a great combo. Don't be afraid of the 430 watt psu. It's more than capable to handle your system.