Roxas_Boy :
kylerjobe :
Agreed ^
The GTX 650 TI is probably the best fit for you. It can still play a lot of games on Ultra.
Also, if you rmobo supports, consider adding another 4gb of RAM. That will help with many next-gen titles such as CoD Ghosts, which use 8Gb of RAM.
Oml. the amount of fail in this comment. Next gen games DO not use more than 4gb of RAM still and I am yet to be disproven. 650TI can NOT play games on ULTRA with playable framerates (assuming this is 1080p)
To be fair, Call of Duty: Ghosts was originally released with a requirement for 6Gb of RAM. This was patched out, but it is likely that future games will start to follow in Call of Duty's steps by requiring more RAM. Ghosts isn't even a graphics intense game, so to say that next-gen games do not use more than 4Gb of RAM isn't an accurate statement.
4Gb isn't a lot RAM anyway, so an upgrade is never a bad idea.