Upgrade for GTX 550 Ti x2 (SLI) around $200

[Aknosis]

Currently running 2x EVGA GTX 550 Ti (01G-P3-1557-KR) in SLI. I'm curious what a decent upgrade might be around $200.

 

[SPBHM]

I think even a single 650 TI boost would be faster...
so something like a 760 would be a pretty significant upgrade.

 

[Keysplayr]

GTX 660 is 200 or under (mostly).
Probably more than twice as fast as your GTX 550Ti SLI.