IBM. I have used IBM laptops for almost 8 years now. They have worked flawlessly the whole time. Well made, they *feel* well made, and I can back this up--I dropped one on a ceramic floor from about 5 feet and its still ticking to this day.
Believe it or not, one of the most important parts of a laptop is the keyboard. Because most of the actual computer parts are the same from machine to machine, the thing that leaves the biggest impression of laptop quality is--the keyboard. Make sure you get one you like. For me, that is--again--IBM.
Can you tell Im a fan of IBM laptops?
I wouldnt buy an IBM desktop, but I wont buy anything other than an IBM laptop. A bit pricey, but 100% worth it IMO.