I've got an Air HDD (quite the opposite of Pros), with the obligatory 2GB RAM. After about an hour of web/youtube/mail/itunes/&c it all gets a bit much for my 2GB, and it resorts to Swap, which, especially on a 4200RPM drive is the world's biggest bottleneck Anyway. On your Pros, how often do you find it resorting to Swap usage, particularly if you're more than 2GB? Thanks ^_^ btw Swap is when the OS runs out of RAM space, so sticks some stuff on the hard drive, which is really slow. It's no fun at all.