I wish 1280x1024 wasn't so common. 640x480, 1024x768, the next logical step in relation to 1280 would be 1280x960, as pointed out already in this thread.
If you don't have the option, which many people don't, just load "generic" drivers. I have a 15" monitor and it somehow lets the options go up to 2048x res or whatever it is. 1024x768 is in the MIDDLE of the slider. I use 1280x960, it's perfect for my 15" Optiquest. I get 70Hz too, it's not great, but better than 60Hz at 1280x1024 which isn't even proportional. 🙂
-RSI