I've done really well with Toshiba. I've had a number of different Satellites and they've all been good.

Once, I dropped one when I was literally running from one end to the other of the Denver airport, trying to catch a connecting flight. It bounced on a metal plate on one of those moving walkways so hard that people turned to see what the big noise was. When I got on the plane, the case had a visible dent in it and I was sure I had cracked the LCD, but was too exhausted to deal with it on the plane. When I got home, I opened the case to find the LCD was fine and it ran like a champ. Anecdotal evidence, surely, but I've stuck with them ever since and not regretted it once.

But, I know several people who have switched to MB for their only computer and seem to be doing just fine with it.