What video card should i get for my computer?

I just bought this computer....iBuypower WA500D3...

I want to get a better card for it... what would you people suggets?

I just want to play stuff like... fps games...GTA IV...folider of fourtian....etc

I have that computer witch is a desk top...but i want a better video card. to play these games



please help...|||THIS ONE IS BEST ACCORDING TO YOUR REQUIREMENT



EVGA GeForce GTX460 SE 1 GB GDDR5 PCI-Express 2.0 Graphics Card 01G-P3-1366-TR

*GEForce GTX 460 SE with 650 MHz core clock

*PCI Express 2.0

*1024 MB 256-bit GDDR5 memory

*3400 MHz memory clock and 1300 MHz shader clock

*NVIDIA 2-way SLI ready|||Buy ATI radeon 5670 cost rs 4500 of 512 MB one it is a very good graphic card and can play every game released in the past and going to be realesed in next 2 and 3 years very finely.

It also not consumes lots of power and you not need to buy a new pcu fot it but for Nvidia GTX 580 you have to buy it which will cost you around 2000 Rs and the GTX 580 will cost you around Rs 20,000.|||without your specs of the pc i cant say what u can use however there are

high end cards starting at 100.00 and up

i have a gtx 460 near 159.00|||Nvidia GTX 580 best graphics card ever