Hi Rohit,
Graphics Cards depend very much on what you plan to do with it and your system specs. Anyway- In a General comparision sense;
ATI Radeon 9600 128 MB vRAM would be the card of choice over XFX nVidia 5200 FX 128MB vRAM.
* XFX 5200 is comparable to Radeon 9200.
* XFX 5600 is comparable to Radeon 9600.
Radeon 9600 would be the card of choice.
References: *www.bjorn3d.com/read.php?cID=279
Cheers,