come up with a figure of how much you want to spend, and what exactly it is you are looking for.
you can get an IBM, Dell, HP, COMPAQ, or any other brand that you like.
all you need to really know is
-Centrino laptop carries: wi-fi, pentium M, and the 855 chipset
offers long battery life, average around 4-5 hours on a charge
-P4-M: just like the P4 desktop version but has speed step technology
offeres longer battery life then regular P4
-P4: regular pentium 4 stuffed in a laptop
cheapest processor with processing power
-Celeron: stay away
-AMD XP-M: offers battery life like P4-M i believe,
basically it is up to you to decide how much you want to spend and wat exactly you feel like you want. Go to a nearby store with display models so you can get a feel for each individual laptop and what you like.