I'm in the market for a laptop as well, and so far I'm considering Sager for high end stuff, but maybe a Centrino from Compaq or Dell. Sager has top of the line laptops for way cheaper than any other company, but they are big (size-wise) and don't have very good battery life (1-2 hours). I'll be commuting from home to school so battery life may be an issue. If it is, I'm going to go with a Centrino. So if you're going to be plugged in a lot of the time, you should seriously consider Sager. If you need battery life over 1.5 hours, you should probably look at other companies' laptops.
If you go to
http://www.pctorque.com they have a Sager Forum that you can ask questions in (even questions regarding other companies' laptops).
Check the reseller ratings for pctorque:
http://www.resellerratings.com/seller3048.html
and powernotebooks:
http://www.resellerratings.com/seller1980.html
Both very high, so that's another factor you might want to consider.
I haven't done as much research into Centrino laptops, but I'm very impressed with the processor's performance and battery life.