Not sure of the prices but I would grab a 7750. If you have enough money and an adequate power supply I would extremely advise you to grab a 7770 if its not much more (its usually around 10 USD more over here and completely worth it)
we're near transition of GPU generation. Maybe in AMD 8xxx series or Nvidia 7xx series you will get better performace for that price. If you can't wait, grab 7770, nice card for low resolution .
Thanks for the replies, roughly when do the next generation cards come out. Also as i forgot to mention my monitor is 1920x1080 would the 7770 still be a good choice or would i be better off going with something else?