Hi there! I've got a friend who is a big time PC gamer. He's really interested in the MacPro (with the top nvidia graphics card, and 2 x 20" ACDs), and is going to ask for one for xmas (wow!). However he thinks the RAM on the apple website is very expensive (as do I), so I was wondering if someone could supply me a website address where to get RAM that would definitely work in the Mac Pro, and perform well, at less than the Apple website. Many many thanks!