whatever you do, dont go with Western Digital. Worst company ever.
Maybe you've had a bad experience, but WD has been awesome for me in the past. Multiple desktop HDs 350MB through 200GB, not a single failed drive.
+1, I've had great luck with Western Digital.
Truthfully, if you look around long enough you'll find some people who can't stand WD, some people who can't stand Toshiba, or Hitachi, or Seagate, or Maxtor, and so on.
I just saw a new review on tomshardware that discusses seven of the 500GB notebook drives. The Toshiba comes away as one of their choices. I personally went with the Western Digital that is about $5 more, mainly because of the speedy access times. But it looks to be a solid drive.