no offence to the 7770 but the 7850 is much betterhttp://www.techpowerup.com/reviews/AMD/Catalyst_12.11_Performance/5.html
look at 1680x1050,
the 7770 good enough for that resolution.
but why get something that is good enough, rather than something that is a lot better than just "good enough"
with a 7850 u can be a lot future-proof, and u can put higher AA too!!
and in some games 7770 can just push 30+ FPS, what will happen after 2-3 years?
and given that the next gen consoles, might launch this year or next,
the 7770 would be too weak, but 7850 is a lot powerful than the 7770,
last longer than the 7770
and therefore a better choice