I did originally think that the GTX 950 would be a better option. Upon research I believe for your price range that the GTX 770 is a really good option for you, although the GTX 950 is a little extra, performance wise it is really similar.
http://gpuboss.com/gpus/GeForce-GTX-950-vs-GeForce-GTX-770
If you take a look at this link, it shows that the GTX 750TI, 770 and 950 are all really similar, but overall, the 750TI is ahead.
I previously owned a 750TI and it was a great little graphics card, and it could run some games at maximum graphics (Skyrim at almost maximum, believe it or not) and it will run at high FPS.
Not sure what games you may play (If any), but personally the GTX 750TI is a really good graphics card, and it is along the same price range (Maybe a little extra) to the 770.
I am going to go ahead and recommend either the 770 or 750TI.
Hope I helped
Have a great day!
- Dom.