Have You Tried Ambiance & Radiance Alt, Beautiful Metacity Themes for Gnome

Ambiance was introduced with Ubuntu 10.04 by Canonical as a way to fix the previous ugly looking theme Ubuntu came with (eeeeh). So in general, I don't know about you but I like it though. But if you're board with that theme as well... then you could give a try at a new theme set called "Ambiance & Radiance Alt" which are also based on those themes + uses the same "Equinox" theme engine.

As you can see the main difference is in the close/maximize buttons. They're located at the right side and rather than making them round... the developer has made them looking like rectangles, which looks pretty darn good btw. The colors are also slightly different as well.

If you want to install them, then please go to this page for downloading and installing instructions. And remember folks... this is a metacity theme and cannot be used with Ubuntu 11.04 Natty.