i have about 200 hundred dallors for my graphics card and im just not sure ive heard that nvidia is more high end but radeon gets u more for ur money but i just dont which to go with
a 5770 would be the best choice at that budget. and you'd have money left over.
nvidia USED to offer better cards, at least at the highest end. but ATIs newer cards dethroned them, and at least until nvidias new cards come out ati offer the best cards at almost every level.
but yeah, for 150 dollars you can get a 5770, a very good card.
Before you go purchase that you should probably post the rest of your system specs, in particular your power supply. You will need a halfway decent power supply to run a 5770.