Suggestions on a new build for 5 boxxing on a single pc

I was cruising along just fine on my e8400 core2duo 8800 gts 8gb ram but it started getting pretty choppy when I stepped through the dark portal. I was ok with the performance in Hellfire Penn until I got to Zangarmarsh. I was gettng a bit concerned and then last night I went to Shatt city and was lagging like a fool. Slaves were losing follow and toons would fall of aldor rise and and I was like whoa I really need to upgrade to quadcore. I was playing around with the idea of a q6600 but all the threads I read here seemed to state that I should build a rig with the next gen processor. My goal is to run to a 5 box with a lot less lag in cities. Let me know what you think before I pull the trigger on this i7 920, 12 gb, nonsli build? Currently I have raid with the same drives and a symlinked wow folder on the same ocz ssd and I plan on doing the same in the new box. Some not so important questions... Has anyone dropped a GTX 285 in an antec 900 and had drive cage problems? How about the coolermaster V8 with a 900 case hitting the window fan? Anyone here upgraded from the n50 to the 52te? I currently use a nostromo n50 and want to try the new n52te if only because it appears to have 5 more buttons I could use. Anyway here is what I put together in newegg for around 2 large and thanks for reading!

Antec Twelve Hundred Black Steel ATX Full Tower Computer Case
Intel Core i7 920 Nehalem 2.66GHz LGA 1366 130W Quad-Core Processor Model BX80601920
COOLER MASTER V8 RR-UV8-XBU1-GP 120mm Rifle CPU Cooler
(2 kits) of CORSAIR DOMINATOR 6GB (3 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Triple Channel Kit Desktop Memory Model TR3X6G1600C8D
ASUS P6T Deluxe LGA 1366 Intel X58 ATX Intel Motherboard
CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power Supply

2 X Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA 3.0Gb/s Hard Drive
OCZ Core Series V2 OCZSSD2-2C60G 2.5" 60GB SATA II & Mini USB 2.0 Port Internal Solid state disk (SSD)

EVGA 01G-P3-1281-AR GeForce GTX 285 1GB 512-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card

Creative 70SB088000004 7.1 Channels PCI Express 1x Interface PCI Express Sound Blaster X-Fi Titanium

BELKIN F8GFPC200 N52TE Tournament Edition

Vista Ultimate SP 1

I don't have any experience with those fittings, but I can recommend you reconsider the motherboard. I've heard there are some issues with the ASUS and 12gb of ddr3 running at 1600 speed.

Thanks for the heads up. I keep finding threads that show 1600 is fine with 12gb I will keep looking though.

You can save about $100 by downgrading from Vista Ultimate to Premium, just make sure it is 64-bit. Unless of course you want the extra features that most people never use and possibly end up turning off to make vista faster, lol.

Lol yeah now Im seeing the pain. A lot of folks are getting probs with running 12 gb at 1600. I am thinking new memory or new board now.

I have 12Go g.skill at 1600 with an asus P6T and it s working good.

it use xp and w7 x64 beta

you need to use good value in the bios because it s ... running .... 1333 , but after it s good

Could anyone please elaborate on these issues with 12gb and Asus P6T DELUXE...