Personally, I think multi-monitor support is quite good, at least with my window manager (awesomewm). Xrandr stretches the X session accross both screens, and a

Personally, I think multi-monitor support is quite good, at least with my window manager (awesomewm). Xrandr stretches the X session accross both screens, and awesome will clone it's interface for the other screen. Each screen has independent workspaces, and you can move windows between the screens by dragging them or using keyboard shortcuts. The only downsides are wallpaper stretching doesn't work well (but it may just be the application I'm using to set it) and the fact that there is a 'space' where the mouse will disappear into if you use two non-conforming screen heights next to eachother. If you find that the default screen settings isn't very good, or don't want to figure out xrandr, try arandr, a very good xrandr gui.