Config X Main compresses the MainMenuBar to half its size. This gives more room with the same functionality as the Native UI with a few options...

 - Experience Bar Color: Blizzard Default, Class Theme, or Custom Colors
 - Multi-Bar Layout: Single and Double stack (Double Split also available)
 - Reputation and Experience Bars flash when you gain Exp or Rep ( Easier to tell if you're getting Exp/Rep for the kill)
 - Hidden MicroButton and Backpack bars that pop-up when chatting or sending in-game mail

Open to comments and suggestions as always... ENJOY!!  : )