Buying a new video card,help please!

Alright turns out my 6600 gt agp card is having problems and im hoping to replace it with one of these cards.

-EVGA 7600GS 256MB

-XFX 7600 GT 256MB

-XFX 7900GS 256mb

I am using a pentium 4 3.0ghz processor with 1gb of ram.

My powersupply has a 12v rating of 17.0a

Now i need your expert advise,which of these cards would be best bang for the buck and would not bottleneck my computer?

thanks in advance.

the 7900 should work fine with my current computer and powersupply?KingSanoM

[QUOTE="KingSanoM"]the 7900 should work fine with my current computer and powersupply?AARONRULZ1