Well i bought the PB:

100GB 7200 rpm HD (Apple uses Hitachi)
1GB RAM (1 stick)
128MB ATI gfx card
15"

I plugged the laptop in, filled out some stuff, it basically set itself up, found the wireless network in my house and that was it. It updated itself, took about 5 minutes..dloaded over 400MB worth of updates and that was it. Sound is great, screen is beautiful, i watched a few movie trailers and it was better than my CRT by far.
I had the laptop on my lap for about 2 hours today, didn't get hot what so ever and quiet as a...quiet baby.

All in all..glad i went with it.