I am in the market for a laptop and these days I am using Linux (Debian) 
as my primary OS. I asked a friend about this and he suggested pay 
special attention to the hardware when considering linux, because it's 
much more difficult to make changes after the fact. He suggested the IBM 
T series, but I think that might be out of my budget. I'm looking for 
any advice, particular vendors you like/don't like, or even things to 
watch out for, when considering a laptop for linux use.

-Sam