Just one problem. On my system 1280x800 is not a selectable resolution in the display settings, nor does Blitz report it. So I'm pretty sure that's not a common resolution for PC's, since I have a Geforce 8800GT, and if that doesn't support it, there goes a big chunk of your audience.
That leaves you with 1280x960 and 1280x720, neither of which are 16:10. So you'd basically be forcing pretty much everyone with a widescreen display to run in a non square pixel mode.
That leaves you with 1280x960 and 1280x720, neither of which are 16:10. So you'd basically be forcing pretty much everyone with a widescreen display to run in a non square pixel mode.