psu neede urgent

[TheLetterD]

hey ppl i hv a mercury 400w psu &config;
e7200
mobo asus p5n mx
160gb hitachi hdd
if iwant 2 use a zotac 9500gt amp will it go with dis psu?>if not which is d cheapest 1 for a zotac9500gtamp/9600gso?
pls help

[The Sorcerer]

corsair vx450? corsair cx400? vip silver 500w? There's allready a psu guide on the forums with recommendations so if you use the forum's search option you will get the guide and hence more information.