Okay the system you all helped me build last time worked out so well I am building one for a friend, mostly browsing and gaming here is my suggestions let me know what you think. (he Plays SC and EQ2 and will play Diablo 3 when it hits the stores)
Thermaltake V6 BlacX Edition Gaming Chassis Mid Tower Steel Computer Case BlacX Top Mounted HDD Docking Station VM100M1W2Z
ASUS MS236H Glossy Black / White 23" 2ms(GTG) Ring stand and Ergo-fit technology Widescreen LCD Monitor w/HDMI
2 SAPPHIRE 100315L Radeon HD 6850 1GB 256-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card with Eyefinity
COOLER MASTER eXtreme Power Plus RS700-PCAAE3-US 700W ATX 12V v2.3 Active PFC Power Supply
looks decent. I'll assume you had an extra 0 in the title, and meant sub-$1000, not sub-$10,000
I'll make a suggestion of getting only a single 6850 for now, and go for the AS Rock 870 Extreme 3 motherboard and a 6-core Phenom II 1075t, which has been shown to get about 5 more average fps than a X4 phenom, 8 more than an athlon quad in WoW at ultra settings
So you would dump the Crossfire in favor of a single card but a faster CPU never used a ASrock Motherboard I have had good luck with Abit and Asus so I am leery on that suggestion I checked the new cards are not on my list but for the price of the 6950 I can get two 6850's is the 6950 really that much faster/better?
I am looking at toms latest 3dBm scores and the 69XX is barely faster then the 6850 "The Radeon HD 6970 shows its mettle here, underperforming the GeForce GTX 570 at 1680x1050 and 1920x1200, but making up the difference at 2560x1600, besting two GeForce GTX 460 1GB cards in SLI (worth about $400). You can’t get around the fact that, for somewhere around $380, you could get a pair of 6850s in CrossFire, though. The single-card solution is more elegant, sure. But performance doesn’t always have to be pretty."
Got to remember power consumption too. When I go to SLI, my PNY XLR8 GTX 460 1GB Superclocked requires 2 6-pin PCIe power cables. Talking about a lot of power to get both cards going. It looks like you will have the power to do it.
I think you are leaving a lot on the table with an Athlon CPU.