darn it I was gonna say 7850 no brainer but then you said you would be playing those games witch are definitely cpu intensive games so its actually quite a tight decision if your gonna overclock like crazy go for 7850 if not go for 650ti
I would like to tell you as a headsup, that you should not post on toms hardware if you have no idea what you're talking about. CPU intensive = CPU, not GPU.
OP, go for the 7850. Will beat the 650ti 10/10.
Especially with the new Catalyst drivers, the 7850 wins easily.
P.S. Just wondering, if you went to school. Your grammar is rather sad.