Here you go if you build it yourself (from NewEgg):
COOLER MASTER HAF 932 RC-932-KKN1-GP Black Steel ATX Full Tower Computer Case - Retail
Model #:RC-932-KKN1-GP
Item #:N82E16811119160
Return Policy:Standard Return Policy
In Stock
$159.99 -$21.00 Instant $138.99
13-128-362 GIGABYTE GA-EX58-UD5 LGA 1366 Intel X58 ATX Intel Motherboard - Retail
Model #:GA-EX58-UD5
Item #:N82E16813128362
Return Policy:Limited Replacement Only Return Policy
In Stock
$298.99 -$10.00 Instant $288.99
14-150-359 XFX HD-489A-ZDFC Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Retail
Model #:HD-489A-ZDFC
Item #:N82E16814150359
Return Policy:VGA Standard Return Policy
In Stock
$249.99 -$55.00 Instant $194.99
17-139-006 CORSAIR CMPSU-750TX 750W ATX12V / EPS12V SLI Ready CrossFire Ready 80 PLUS Certified Active PFC Compatible with Core i7 Power ... - Retail
Model #:CMPSU-750TX
Item #:N82E16817139006
Return Policy:Standard Return Policy
In Stock
Mail in Rebate Card17-139-006
$179.99 -$70.00 Instant $109.99
9-115-211 Intel Core i7-950 Bloomfield 3.06GHz LGA 1366 130W Quad-Core Processor Model BX80601950 - Retail
Model #:BX80601950
Item #:N82E16819115211
Return Policy:CPU Replacement Only Return Policy
In Stock
$569.99
20-227-421 OCZ Platinum 12GB (6 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Low Voltage Desktop Memory Model OCZ3P1600LV12GS - Retail
Model #: OCZ3P1600LV12GS
Item #:N82E16820227421
Return Policy:Memory Standard Return Policy
Out Of Stock
Auto-Notify20-227-421
$199.00 -$25.00 Instant $174.00
22-136-284 Western Digital Caviar Black WD1001FALS 1TB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drives - OEM
Model #:WD1001FALS
Item #:N82E16822136284
Return Policy:Standard Return Policy
In Stock
$109.99 -$10.00 Instant $99.99
23-109-048 Microsoft 4GC-00002 Silver/Black Wireless Ergonomics Laser Desktop 4000 - OEM
Model #:4GC-00002 OEM
Item #:N82E16823109048
Return Policy:Standard Return Policy
In Stock
$49.99 -$18.00 Instant $31.99
27-136-168 LG 22X DVD Burner - Bulk Black SATA Model GH22LS50 LightScribe Support - OEM
Model #:GH22LS50
Item #:N82E16827136168
Return Policy:Standard Return Policy
In Stock
$27.99
29-102-007 Creative Sound Blaster X-Fi Xtreme Audio 7.1 Channels PCI Interface Sound Card - Retail
Model #:70SB079000000
Item #:N82E16829102007
Return Policy:Standard Return Policy
In Stock
$54.99
35-100-007 Arctic Silver 5 Thermal Compound - OEM
Model #:AS5-3.5G
Item #:N82E16835100007
Return Policy:Consumable Item Standard Return Policy
In Stock
$8.95
Subtotal: $1,700.86
The RAM I selected is out of stock, but if comes back in stock, then its a good price.
NewEgg doesn't have a great selection of HSFs, but I would recommend the TRUE or
Prolimatech Megahalems (for $65.00 exc. shipping):
http://www.frozencpu.com/produ...48c373s960&id=RKGDsXi3
Add two Yate Loon D12SM-12 fans and the fan clips ($85.00 total) in a push-pull config.
That brings the total to: $1,785.86 (some shipping will be extra, say $30.00 at a guess). An alternative build to the one you posted for a bit extra $$$. I'm sure others can recommend alternative components and bring the cost down (ditching the I7 950 for a 920 is an obvious cost saving)
ATI don't have certified PSUs for the HD4890, but I've based my PSU recommendation on quad-fire set up for two HD4870 X2s which will easily be enough for two HD4890s in X-fire:
http://game.amd.com/us-en/cros...ex_components.aspx?p=3
The only thing I haven't included is a monitor and OS. In the latter case, get yourself a copy of MS Windows 7 RC 64 Bit (if you still can download it) for free.