How many Watts should this computer have?

[eryx24]

Intel Core 2 Duo 3.0ghz e8400
Seagate 500GB HD
Kingston Hyper X 4GB ddr2 800
Evga GTX 260 896MB
Asus P5QL-EM LGA 775

I was leaning toward 750W, but would that be too much?

 

[jamesgoddard]

A top quality 550W would be fine - but the 750W would give you extra future proofing - I guess it depends on the cost...