If you're willing to go somewhat outside the mainstream (and it's a bit mind-bending, although ultimately awesome) try bodhi linux. 2.2.0 is coming out in a couple of weeks, based on the e17 window manager. Extremely light and snappy and built on top of the latest Ubuntu stable release.
notetab can fix it
It is difficult to get a man to understand something
when his job depends on not understanding it.
-- Upton Sinclair