I have a Lenovo Thinkpad T61P. It would be a good machine except (1) the screen quality is consistent with that described in this article. Furthermore, it's developed hundreds of dead pixels. (2) The shift keys need to be hit exactly in the right place for them to work - the keyboard is a bit dodgy. (3) I had to replace the battery twice (under warranty) in a period of 6 months after buying it. I paid for quality (and was happy to based on reputation), but did not get it. It's been a very frustrating.

My day job laptop is a Dell D630. Very happy with this. My next laptop will be a Dell. The track ball on the Lenovos is much better.