I have an inspiron 600m that I bought from the outlet. Just make sure it has the accessories you want.
For example, I wanted XP Pro, 40GB hd, and 802.11g wireless built in. It took a little while to find a model that had all that. Plus, I was waiting for one of their bigger sales. (The deals change all the time, gotta keep an eye out.)
I added a 3-yr warranty and the 3-yr whatever happens warranty.
So far, no problems with it. I had a more powerful, but heavier, laptop...and I'm really glad to have the smaller one.