Re: New PC Build 2011
That will all run BF3 just fine.
I personally don't trust, or like, XFX as a video card brand as I've stated in previous posts. This is mainly because they outsource a lot of their parts and tend to have a cheaper build quality compared to some of the other Radeon brands (a hit or miss company as sometimes you get a quality card as well). I would recommend looking into a Sapphire branded card (not bias, just fact as I've personally owned XFX cards which died and caused me to look into them a bit further).
If your going with Western Digital, look into their Caviar Black FASS line, its real fast, and though the slightest bit nosier it is by far their best HD. 500GB is more than enough for one game.
I personally like the Crosshair V over the first board you listed. It will give you space to build the system up more over time and is a very well built board.
Your PSU options should not be CoolerMaster and OCZ. Look into a higher quality brand. I recommend to you the newer Corsair Enthusiast Series PSU's. All high quality parts taken from Seasonics best models, and high quality cabling and wiring on the inside so that you never worry about shorts.
The GSKILL series is a good series of ram, so stick with that.
The Phenom X6 processors are overkill. They cost more, and you will (I guarantee this) not notice a performance increase in gaming. They have barely utilized the use of 4 cores at this point, and the current best processors for gaming are X4 core at this point in time. The only time you will notice a performance increase is in heavy graphic design or video editing. Neither of which you mentioned doing.
If your going to use money on a aftermarket heatsink, look into a Corsair closed water cooling block instead. The better models are the Corsair Hydro H-50 and Corsair Hydro H-70 series. They unfortunately began "cheaping" on build quality on their newer blocks. The difference to tell them apart is that the H50 and H70 have circular cooling blocks whereas the newer models are squares.
Everything else looks fine, make sure to get Windows 7 64 Bit and the CM 912 is a great case.
Case: Cooler Master Haf X
CPU: AMD Phenom X4 955 Black Edition Deneb
MOBO: Gigabyte 890FXA-UD7 [4X XFire Support, 6GB Sata Connectors, 16GB RAM Support]
VGA: 2 Sapphire Radeon 5850 Toxic Edition Video Cards Xfire'd
HD: 3TB Western Digital Caviar Black
RAM: 8GB Corsair XMS3 DDR3 Ram
PSU: Corsair 850TX Enthusiast Edition
Drives: 1x Sony Optaric Blu-Ray Drive, 1x Lite-on DVD RW Drive
Cooling: Corsair H-70 Water Cooling
ETC: Razer Mamba Mouse, Logitech Z-5500's, 2x HP 27" 2709m Monitors