The i5 is only about $30 more than a good phenom , by far the best bang for the buck right now. If you can spring for the extra $125 more go for the 5850 over the 5770. It looks like with that PSU and mobo, your getting ready to crossfire. You can get 5770x2 which will outperform a 5850, or one now and one later. Or get 2 5850's and go nuts! It all depends om your budget. If you feel like waiting, or you are not building anytime soon, wait and see what fermi brings.
and yes the processor is just $30 more but the motherboards are more expensive, in total the difference would be at least $60...but go with a i5 and crossfire the 5770 is an option, but phenom II x4 and 5850 is the other option. For example the motherboard you chose is $160 you can find good am3 motherboard for as low as 100+160 of the processor = 260 the i5 is 200+160 of the motherboard =360
Weird how I never heard anyone say that about the 4870, which is practically the same.
I agree. HD 4870 at 1920x1080 is fine
HD 5770 is more then ready for 1920x1080.
If your using for games only the recommended phenom/HD 5850 is the best choice.
the I5 combo you choose with the 5770: $529.97
A Phenom II 955, HD 5850, and decent AM3 motherboard ($89.99~): $549.97
The difference in gaming will be very evident, and you can easily crossfire the HD 5850 in a year to keep up with games. Something which even the 5770 crossfire would not be able to do in a year or two with DX 11 games.