Amd x4 955 build

Hi im kinda noob so i thought i would ask some advice.going to build a x4 955 this weekend here is what im going wiht so far any input would be nice thx. Cooler Master HAF 932 Full Tower ATX Case (RC-932-KKN1-GP)

Yes $172.99 $172.99

AMD Phenom II X4 955 Black Edition (125W) Quad Core Socket AM3 , 3.2GHz, 8Mb Cache, 1800MHz HT, 45nm (HDZ955FBGIBOX)

Yes $289.99 $289.99

Western Digital Caviar Black (WD6401AALS) 640GB SATAII 7200RPM 32MB Cache (OEM)

Yes $82.99 $82.99

Gigabyte GA-MA790FXT-UD5P Socket AM3 AMD 790FX + SB750 Chipset Dual-Channel DDR3 1666(OC)/1333/1066Mhz 6x SATA 3Gb/s 7.1- Ch HD Audio Dual Gigabit Lan IEEE1394 2x PCI-Express 2.0 Graphic Slots ATX

Yes $204.99 $204.99

Corsair XMS3 4GB (2x2GB) 240pin DDR3 SDRAM 1333 (PC3 10666) Dual Channel Kit Desktop Memory (TW3X4G1333C9DHX)

Yes $105.99 $105.99

Corsair TX Series CMPSU-850TX 850W ATX 12V 60A 24PIN ATX Power Supply Active PFC 120MM Fan

$154.99 after $20.00 instant rebate Yes $154.99 $154.99

MSI R4890-T2D1G-OC ATI Radeon HD 4890 Chipset (880Mhz) 1GB GDDR5 (3996Mhz) Dual Dual-Link DVI PCI Express 2.0 Graphics Card
Cooler Master HAF 932 Full Tower ATX Case (RC-932-KKN1-GP)
$254.99

LG GH22NS30 Black SATA DVD-Writer 22xDVD+R/-R 8xDVD+RW/6xDVD-RW 16xDVD+R DL 12xDVD-R DL 48x CD-R 32xCD-RW OEM
Yes $29.99 $29.99
OCZ (OCZTVEND2) Vendetta 2 CPU Cooler For Sockets AMD 754/755/939/AM2, Intel LGA775*

$27.99 after $18.00 mail-in-rebate Yes $45.99 $45.




Total $1,337.91 canadian or around 1100 us

Maybe if you want to add another 4890 later on in life, then the 850w would be necessary, but if not then its overkill.