Double check my config please

[MyFirstSLI]

Here is what I am looking at ordering:

Product Price QTY Total Link
XFX GeForce 7900 GTX EXTREME (675MHz) 512MB PV-T71F-YDE9 Video Card - Retail $495.99 2 $991.98 http://www.newegg.com/Product/Product.asp?Item=N82E16814150136
Tyan Thunder K8WE (S2895) AMD-8131 AMD Opteron DDR Server Board w/Audio, Dual GbE LAN, SCSI, RAID/Serial ATA II Retail ***Free Shipping*** $569.00 1 $569.00 http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=241863
AMD Dual-Core Opteron 280 1000MHz HT Socket 940 Dual Core Processor $862.99 2 $1,725.98 http://www.newegg.com/Product/Product.asp?Item=N82E16819103573
8GB Kit ( 4 x 2GB Modules) DDR PC3200 400MHz ECC/REG 256x72 CL3 2.5v DIMM $1,260.00 1 $1,260.00 http://www.datamem.com/viewcat.asp_Q_C_E_1347
Microsoft Windows XP Professional X64 Edition Single Pack - OEM $139.99 1 $139.99 http://www.newegg.com/Product/Product.asp?Item=N82E16837102065
Swiftech Storm Waterblock A64 $79.99 2 $159.98 http://www.crazypc.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=9303
PC3-724BK, Black $549.00 1 $549.00 http://www.koolance.com/shop/product_info.php/products_id/200
SeaSonic S12-600 600W Power Supply - Retail $164.99 1 $164.99 http://www.newegg.com/Product/Product.asp?Item=N82E16817151025
Western Digital Caviar SE16 500GB 3.5" SATA 3.0Gb/s Hard Drive - OEM $259.99 2 $519.98 http://www.newegg.com/Product/Product.asp?Item=N82E16822136014
PLEXTOR Slot Load 16X DVD±R DVD Burner Black IDE Model PX-716AL/SW - Retail $148.99 2 $297.98 http://www.newegg.com/Product/Product.asp?Item=N82E16827131352
MITSUMI USB 2.0 Internal digital card reader with Floppy Drive Black Model FA404M BLK - OEM $19.99 1 $19.99 http://www.newegg.com/Product/Product.asp?Item=N82E16821104104
CPU-305-V10 (CPU) $95.99 2 $191.98 http://www.koolance.com/shop/product_info.php/cPath/29_44/products_id/210
HD-55-L06 (HDx2) $59.99 1 $59.99 http://www.koolance.com/shop/product_info.php/cPath/29_45/products_id/231
Danger Den NV-78 Nvidia 7800 Series Water Block GPU Cooler $126.45 2 $252.90 http://store.pcpowerzone.com/dadennvnv78s.html
Arctic Silver 5 High-Density Silver Thermal Compound 3.5g Tube $8.00 1 $8.00 http://store.pcpowerzone.com/arsi5hisithc.html
RAM-30-V06 (RAM) $49.99 2 $99.98 http://www.koolance.com/shop/product_info.php/cPath/29_56/products_id/251


I know I need cable but this is my first liquid cooled system. Other than the hardware itself, please make sure the liquid cooling is adaquate and let me know what other tubing i need to order.