new build

[just a noob]

ok, could someone please tell me what to add or replace on this?
cpu: q9450
motherboard: evga 790i ultra
ram: 4gb of muskin ddr3
graphics: 2 gtx 280's in sli
psu: corsair 1000hx
hdd: 500gb western digital caviar
os: vista ultimate 64 bit

anybody have any suggestions for this?

 

[reddevil6]

why waist the money getting the 2GTX 280s when 2 4870s is better by the tiniest bit but a hell of alot cheaper.