Be certain to avoid P4 laptops in favor of the Centrino M processors. Much cooler and more battery efficient.

I've had very good reviews from the office road warriors on their Dell D500 and D600 laptops that I've procured over the last few months. The D505 and D800 (Dell Latitude) are available with 15"+ screens. They also offer an accident protection option (3 years).

I don't purchase the Precision or Inspirion lines, so I can't comment on them.

-Zeke