I know this thread is old but I haven't seen anyone recommend Goggles Music Manager. Google it and check it out. It's very lightweight and straight to the point. Ever since i've learned about it and started using it; I haven't looked back.
I have used many different types of Window Managers but it seems that after using them all I am stuck on Xmonad. Im running archlinux and with the Xmonad twm running its super lightweight and works perfectly with my type of work. At first I couldn't stand twm's because i couldnt get my windows how i wanted them.. but after some getting used to there is no going back. xmonad ftw!