I'm in the middle of doing a computer build, using for gaming & general computing. I'll overclock it to 4.0ghz. I've got the last of the components coming in from Newegg on Monday. Let me know what you think.
Here is my build break down.
(Case) CM Storm Sniper "Black Edition"
(Power Supply) OCZ 700w 80plus rated
(Motherboard) ASUS Crosshair IV Formula
(Processor) AMD Phenom II X6 1090T
(CPU Cooler) Tuniq Tower 120 Extreme Universal CPU Cooler
(Memory) G.SKILL Ripjaws Series 8GB (2 x 4GB) DDR3 1600
(Video) SAPPHIRE Radeon HD 5870 2GB 256-bit GDDR5
(Hard Drives) x3 Western Digital Caviar Black 640GB 7200 RPM SATA 6.0Gb/s
The HDD setup is bad and pointless IMO, get 2 F3 1TBs for near-identical performance and space in RAID0 for $60 less with a lower failure rate, or a SSD for even better performance.
8GB is also overkill for gaming.
Other than that its a *decent* X6 build, though if simply for gaming there are better options. For example the replacing the Crosshair with this, or even this if you want to keep the colors. A 970BE should also hit 5Ghz fairly easy while being $100+ cheaper, as the extra 2 cores on the 1090T don't really help out in terms of gaming.
Finally, with the HD 6900s coming out next month and 6800s next week, I wont suggest you buy a 5870 now either. Don't want you to regret your purchase just after a month.