Use Compiz and window resizing works fine, be sure to set default resize mode to outline though or resizing may get a little laggy.
No issues with tearing here using Nvidia hardware and I don't really need to switch Windows using the super and numeric keys, I'd never remember them all. Make use of multiple workspaces and all is fine. This may be something you can implement under Compiz, personally I've never tried it, but Compiz is quite powerful and fully featured.
Also, follow the instructions here to stop Compiz crashing when minimizing windows: