I have a 1680x1050 screen too. I use 78 fov, and 0.108 offset. I used to use 75 FOV before increasing it to 78 which is xbox default, h2pc default is 72. The offset defaults are 0.165 for h2pc, 0.138 for xbox, but most xbox's were hooked up to a 4:3 or 16:9 screen. I think it looks better...