Quicktime for sure is not the reason I own a few Apple computers. I have a PC and I have run various versions of BSD on them. I am not a fan, I like the simplicity and the attention to detail that Apple has put into the OS. Little things like the installer, and larger things like factory supported distributed computer out of the box. In terms of software taking up too much memory iTunes takes 25MB, of my 4GB on my PowerMac, and 25MB of 2GB on my MacBook Pro. Firefox takes up twice that when I browsing hondaswap. I need to boot into Windows and see what the memory allocation is for iTunes.