Should I get a 750Ti?

When my exams are over I'll have a chance to buy a graphics card. I don't need something extraordinarily powerful, mainly because I don't mind very much and also because I will only have the PC I currently have for about two years in the future.

Many people have recommended buying a 750ti, but I would also like to see what anyone else would recommend. My budget is around £130 and under. I currently have an AMD 5670 graphics card, a i5-2500K CPU and 4GB RAM, although I really want to improve my RAM as well. I still need to check out my PSU, I'm not sure how powerful it is , that's why a lot of people recommend the 750ti for its low wattage.

Thanks for reading.