Getting New Gpu

I'm getting a new gpu but I'm having a hard time figuring out which one I want.  

I have had a zotac gtx 550ti in the past and I loved that card to death.  I decided it was time to upgrade so I got a 7870 xfx Double D but wasn't that impressed.  It runs games but I don't get that good of fps.  I get like 30-40 fps on bf3 and 1366x768 res, and low 30-40 on most of my games.  I seemed to have much better fps with my old 550 ti and I don't know if I have a dud of a gpu.  I heard that the 760 is a killer gpu from Nvidia which I'm leaning towards, but I have also heard that the 7950 beats itl (as I said i have had better luck with nvidia so I really want one).  If I could get your guys opinion that would be great.

Thanks

Josh

Ohh price range is 270$ and nothing higher

Pick up one of these

http://www.newegg.com/Product/Product.aspx?Item=N82E16814127737

This card beats a 760 most of time as you mentioned

The 760 is pointless to get right now, Its just way more expensive than other similar performance options.