The Pentium M is made for laptops. Smaller, but designed to run like a regular processor (so even though it’s only 1.6Ghz, it’s comparable in speed to a desktop computer with, say a 2.8 GHz).
Get a Dell, go with the Latitude series, We have a Latitude D510 I think.
Also, here’s a hint. Sometimes the small-business division has better pricing on the laptops. You CAN order from the small-business division, just pretend that you have a sole-proprietorship. Give them your SSN as the Fed ID #, and they will run your credit and give you a “revolving Net 30” account (at an outrageous interest rate…) and you can pay anything you want per month, over the minimum of course ($30 is our minimum, and we got a $1,300 laptop). Make it (your name here) Enterprises as your “company name”.
I have a compaq n800v 2ghz, 512mb ram, dvd/cdrw, wireless. HP and Compaq have been good to me over the years as far as laptops are concerned. My little sister had a dell that ran great for the 4 years she had it while in school. Just get something with a decent warranty and you really can’t go wrong.
I’ve used Dell’s from back in the P2/P3 days as well as EM64T. All great desktops, and their support has been pretty darn good here at work.
Personally, I have a Dell Latitude C610 (P3, something like 2 generations ago) and it’s been a great little laptop. No complaints with Dell products in general.