The i5 will not bottleneck any GPU as far as I'm concerned. It will be absolutely fine with a 770!
Personally, I used to have a 7850. It gave me a horde of problems so I sent it back for a refund. I was looking at 660's/660Ti's, but at that point (around a month ago), the 760 was released.
I now own an MSI 760 and I am astonished by its performance. Much, much faster than the 7850 and offers optimal frames at 1080p. The MSI version has the great TwinFrozr cooling which is inaudible and I have never seen the GPU go above 58c on full load. The EVGA ACX seems like a good bet too, I would have got that but it was not in stock for a long while.
The 770 is considerably faster than the 760. Just becase I own the 760 I will not at all try to stop you getting the 770. I just feel that a 760 is better value IF you are only going to be gaming at 1080p like me.
As for the PSU, Corsair or XFX are the best manufacturers for me. You could get a Corsair 600W or an XFX Pro650W (I own this). Either will be fine, they are both reliable brands. Whatever you go for, make sure it is 80 Plus Bronze certified.