It surely deserves another thread.
But you are running at what 2.7ghz?
My poor XP 1500+ always keeps over 20 FPS in towns with view at ~1/3 But hey, it is still bearable for a great game.
And why don't you run at 1600x1200, not much of a difference to me. 1-2 FPS. Even though i went down to 1024x768 as I am normally around 26, 27 fps so those 1-2 mean something to me. But 1600x1200 looks much better.