I'm a Pepsi man too!
I've got my resolution at 1920x1080 and trees on low. Everthing else is med or high. (I'm not at my desktop and will have to give you the actual specs later) I get around 35 to 55 depending on whether I'm close to the ground and how many planes are on the screen. I'd like to have crank things up higher and higher fps but I never experience any stuttering or slow downs. I do plan on an GPU upgrade when the new nVidia cards come out -- probably to a nVidia GTX 580 -- if the price drops when the new cards come out.
Crockett
I'm running a 580, all sliders to max.
Runs great.