For todays gaming needs? i can get a 770 for around 180 now, coming from a 270x. I could get a gtx 970 but id rather not spend all that cash.
If you playing at 1080p or even 1440p on a lot of games, the 770 still kicks ass. I just upgraded from a 770 to a 980 and so far on 1440p, I'm getting more frames, but it aint night and day different. As far as 2 gigs of ram goes, even on 1440p, I rarely got close to that amount on the 770