That won't run indeed, maybe XFCE is a option?
That depends.
I noted that people using such devices as palms, smartphones, tablets want to have almost all of the features they use right there immediately.
So lots of widgets on desktop, plugins in trays, programs in background, launchers in panels.
When I decided to change WM I got through multiple tries.
I tried xfce - nice one but after equipping it in all those network applets, system monitors, quick notes, taskbar it became as heavy as standard lxde.
I tried WMaker. Harder to equip it with needed gizmos and took more screen to just be there. No mention about not complete menu with applications.
I tried one of minimalistic WM-s (blackbox or similar) - no gizmos but lots of work wolud be needed to have all of that functionality under keybindings.
After all I ended up with standard lxde. Two panels 16-24 pixels wide (not sure about exact size right now) one for menu, launchers, applets and one for task switcher and desktop switcher.
Im not very satisfied because this eats quite big chunk of the screen (which is not nice when using gimp or qcad/kicad) but it is acceptable.
The biggest difference is to have a bit of swap and disabling all of that crap in background (pulseaudio, sendmail, some of applets)