I think 800x600 is pretty safe. Kinda ugly for PC monitors i tend to find, after running most of my stuff in 1024x768 for some reason. My monitor 1152x846, because that's the 1 to 1 pixel ratio thingy.
Even the old monitor in work can display 1024x768, but things just run alot faster in 800x600.
Even the old monitor in work can display 1024x768, but things just run alot faster in 800x600.