Alright, I came from a dot com company which uses plenty of notebooks(60 a year), I can tell which is a no no... Acer, Dell, TwinHead, NEC and HP. Toshiba, fujitsu and IBM are reliable, but in terms of durability, I can only vote for IBM. Have used the x21, x31 and now T43. All gives super result. Changed them not because the are spoiled, but for faster CPU requirements. Still have the x31 where my wife is currently using.
Oh just to add, I drop my x31 twice from a 4 feet table top, and it survived! Note sure if others have droped their notebook b4? Not sure if a MAC can survive a 4 feet drop. MAC is cool, OS is also solid, but software if very hard to find, especially those "xxxxxxx" ones.