Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
12.5 mm tall, would these fit in the MB/MBP I thought they could only take 9.5 mm (not really sure hence asking).
 
I'd be fine with 5400rpm. Just having 500GB would be great since I only have 80 right now and it's a pain to upgrade the MBP.
Upgrading the drive in a MBP is easy. Takes all of 15 minutes to do the physical swap. If you get a cheap external enclosure, Carbon Copy Cloner or SuperDuper make easy work of moving the contents of your drive to the new one. I've done this twice now (first with 7K200, and more recently with Scorpio 320).
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.