AMD Phenom(tm) 9500 Quad-core Processor 2.20GHz
I'd say that's good enough
8800GT + E2180 = 1080p with CoreAVC or w/o depend on bitrate 
AC, AC2, Crysis, ME, ME2, Batman AA all playable on high
It's super good for me 
Mayby try 8800GT
it's very good GPU
The 5770 is a bit faster and supports DX11. The 8800GT was a good card, but its time has passed; it doesn't even support DX10.1.
And those games play at 1080p? With all the eye candy + AA? At or above 60 FPS? I doubt it. I had to turn Batman down to 576p with no AA, and some lighting effects turned off to get it to work with even medium PhysX when I had a 9800GT. Just Cause 2 can bring even my GTX 470 down to 15FPS at times, and it crushes the 9800GT.