Previous used Ubuntu Gnome with Compiz but for my basic spec intel macbook (4 years old) its a little too heavyweight. So for now Im back on my macbook with os x, but now considering going back to Linux. Im looking for a window manager that has the following properties:

1. Supports virtual desktop (need 4 minimum)
2. Works well with multi monitors - can move an app with shortcut from one monitor to the other (on same virtual desktop)
3. Can remember window position (i.e. open vim on 2 monitor) - however must coerce everything back to first screen when 2nd screen is unplugged
4. Keyboard shortcut friendly
5. Not too hard to install
6. Works well with minimum hardware such as integrated graphics

Please suggest and share your experiences