So I switched over to Xubuntu on my desktop, It was a tough decision as I truly love Debian, but there are trade-offs, If you stick with Debian Stable, your software is out of date, but if you run testing, you get newer software, but serious instability sometimes. After my latest run of a few days without X, I finally bit the bullet and installed the Karmic version of Xubuntu. Xubuntu is a standard Ubuntu release, but uses XFCE as it's desktop. It's fast, simple, and more customizable than Gnome.
If you are looking for a nice fast desktop, Xubuntu can fill the need, and it works on older hardware than stock Ubuntu