Found this Ram over at Amazon.com that you should take a look at, for $30.00 more you can get a 6gb(3x2gb) kit.
OCZ OCZ3P1333LV6GK DDR3 PC3-10666 1333 MHz 6GB Platinum XTC Triple Channel Kits $99.99 & this item ships for FREE with Super Saver Shipping.
http://www.amazon.com/OCZ-OCZ3P1333LV6GK-PC3-10666-Platinum-Channel/dp/B001IT2E42/ref=pd_sxp_grid_pt_2_2
Also if you have a Microcenter near you you might want to get the Core i7 920 CPU there, just make sure you get the DO Stepping for around $200. Link for Store Locations below.
http://www.microcenter.com/at_the_stores/index.html
Core® i7 920 Processor Boxed, make sure it sows this on box > SLBEJ
http://www.microcenter.com/single_product_results.phtml?product_id=0302727&utm_source=mcol&utm_medium=leader_bnr&utm_campaign=hmpg_intel_i7920
Here is a good Combo Deal fo the Mobo you picked and OS.
1. Microsoft Vista Home Premium SP1 64-bit w/free Windows 7 upgrade coupon 66I-03525: $109.99 Free Shipping*
2. ASUS P6T6 WS Revolution: $349.99
Combo Discount: -$25.00
Combo Price: $434.98
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.234364
Did not see Case, Monitor, Optical Drive or Operating System mention in your Build Specs plus other items you might be needing.
Lets start off with the Cases', here are some with very great Airflow that you should check out below.
Antec Twelve Hundred Black Steel ATX Full Tower Computer Case - Retail $169.99 Free Shipping*
($10 off with promo code ANTECAUG, limited offer)
http://www.newegg.com/Product/Product.aspx?Item=N82E16811129043
COOLER MASTER HAF 932 RC-932-KKN1-GP Black Steel ATX Full Tower Computer Case - Retail $139.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16811119160
Another Combo Deal with above Case and the PSU you picked.
1. Corsair Memory CMPSU-750TX: $119.99 Free Shipping*
2. Cooler Master HAF RC-932-KKN1-GP: $139.99
Combo Discount: -$10.00
Combo Price: $249.98
$20.00 Mail-In Rebate Card
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.236865
Next up is Monitors', here are a few at various sizes that you should check out.
ASUS VH222H Black 21.5" 5ms HDMI Widescreen $169.99 ($159.99 after $10.00 Mail-In Rebate) Free Shipping*
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236053
SAMSUNG 2343BWX High Glossy Black 23" 5ms 16:9 Widescreen $209.99 ($189.99 after $20.00 Mail-In Rebate)
(Maximum Resolution 2048 x 1152 )
http://www.newegg.com/Product/Product.aspx?Item=N82E16824001317
ASUS VK246H Black 24" 2ms(GTG) HDMI Widescreen $219.99 Free Shipping*
http://www.newegg.com/Product/Product.aspx?Item=N82E16824236048
Optical Drive
Sony Optiarc 24X DVD/CD Rewritable Drive Black SATA Model AD-7240S-0B - OEM $29.99 Free Shipping*
http://www.newegg.com/Product/Product.aspx?Item=N82E16827118030
Get one of these CPU HSF Coolers'.
CoGage True Spirit Heatpipe CPU Cooler with 120mm PWM Silent Fan for Intel LGA1366 $37.95
(It is similar to the ThermalRight and cools within 1 or 2 degrees' of it.)
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=450&products_id=26022
If you do get the CoGage True Spirit, I would suggest this Mounting Bracket, instead of the Push-Pin one that come with it.
Thermalright LGA1366 Bolt-Thru-Kit Retail BOX Bolt-thru Board Mounting kit $9.95
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=173&products_id=24667
If you want one of the Best CPU HSF Cooler for the Core i7 then I would suggest this one, but it is more expensive.
Thermalright Ultra120 eXtreme-1366 RT Premium Heatpipe Cooler for Intel LGA1366 $74.95
http://www.performance-pcs.com/catalog/index.php?main_page=product_info&cPath=450&products_id=24727
One of the latest Reviews on 1366 CPU HSF Coolers'.
http://www.hardocp.com/article/2009/07/23/intel_core_i7_heatsink_roundup_q309/5
Items you will need.
Thermal Compound.
ARCTIC COOLING MX-2 Thermal Compound - Retail $7.98
http://www.newegg.com/Product/Product.aspx?Item=N82E16835186020
You will need this 8-pin Power Extension Cable for most Cases that has Bottom Mounted PSU.
1ST PC CORP. 12" 8-pin EPS extension cable Model CB-8M-8F - Retail $8.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16812706004
*note: Here is an alternate to your Mobo selection that you should look at, plus it has the same ombo Deal with the OS, I suggested above, unless your friend is going with Tri-SLI.
The ASUS P6T Deluxe V2 LGA 1366 Intel X58 ATX Intel Motherboard - Retail $289.99 Free Shipping*
http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.234350
Another option you should look at is going with the GTX 275, either one of these.
EVGA 017-P3-1175-AR GeForce GTX 275 1792MB 448-bit $274.99 ($254.99 after $20.00 Mail-In Rebate)
Free Shipping*
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130476
EVGA 896-P3-1170-AR GeForce GTX 275 896MB 448-bit $239.99 ($219.99 after $20.00 Mail-In Rebate)
Free Shipping*
http://www.newegg.com/Product/Product.aspx?Item=N82E16814130475
Also would consider a Storage/Backup HDD in the 640gb to 1TB range, if you still are goig forward with the SSD.