Since Arch doesn't come with a window manager out of the box, while you're trying new things, try installing a tiling window manager as well. Awesome[1] and Xmonad[2] are both good choices. If you want to be a power user of your window manager, you'll want to check out a tiling WM at some point.
[1] http://awesome.naquadah.org/
[2] http://xmonad.org/