Hi the difference between all the AA settings is minimal visually but it can kill the frames. I don't recommend using anything other then box unless you have crossfire. I run with all setting default to the program and mipmap at "quality". Its more important to run above 60 fps then to drool over the beautiful slide show.
To get your FPS higher drop the AA on COD4 to 2AA (box), Crysis.....I have crossfire to keep my frames above 60 at medium.
Wait for Vertical refresh is Vsync so that should be always on.
Cat AI should be on "standard" (it runs optimizations).
Just take off AA completely. The performance hit you get when you enable it is not worth the extra frames you get when its disabled. Just set everything for performance. Disable Catalyst A.I. As far as Vsync goes, enabling it will give you a performance hit, however if you don't, you will experience some tearing. If you can live with that, then keep it off. Just keep the resolution fairly high and keep the settings at high on most games. As far as Crysis goes, who really cares. Its just a tech demo Though if you want better performance, disable shadows. This isn't Thief after all.