I returned to the classic Clearlooks Theme which is very OSX ish. It is very clean and crisp with sharp fonts. I've coupled this with an install of the new Firefox 4 Beta 11 browser, and the new GmusicBrowser music player. It offers an iTunes like interface, and EQ not much different than Rythmbox music player. New Ubuntu wood wallpaper is also used.
Firefox 4 beta 11 web browser below. Very fast.
Firefox v3.613 browser
Chromium browser
gmusicbrowser music player
Nautilus file manager
Rythmbox music player with cover art