It's running much smoother now. Getting 30+ fps over London now even with ssao and shadows turned on. The textures on the buildings and bridges don't pop until I'm right on top of them, but it's better than the alternative. Now if there was only some way I could save my weapon loadout I could actually start to play the game. The default convergence is way too far out for me.
core i7 920 stock
6GB DDR3
GTX 570 superclock
win7 64-bit