I currently have a CTO PowerBook 15 - 5400RPM HDD, 128MB VRAM. Nice machine, but, I really don't think I like it as well as the PowerBook 12 I owned before I purchased it ... it was a rev b. and unlike the 15 ... no gaps between the screen and body of the machine, weighs 1lb less, feels more "sturdy", easier to carry around, etc..
I'm giving serious thought to selling it and getting a 12 rev c with 768mb and 5400rpm hdd ...
I use it for Xcode, some Photoshop, some Final Cut Express ... documents, internet use ... a lot of command line / UNIX stuff ...
Opinions please???