Just installed Novell's Suse Linux Enterprise Desktop 10 RC 3... (Not to be confused with OpenSuse 10.1), and I have to say that the 3D Xgl Desktop and Beagle Search are pretty slick.
While I normally favor Debian based Distros with Synaptic... SLED 10 is pretty cool for a full distro. (Though I'm not liking YaST too much)
I still prefer Xubuntu for a more lightweight and efficent choice... but SLED 10 could give Vista a run for it's money without the Vista Bloat.
You can check it out, here:
Since it's a pre-release... it's free.