Would it be useful to have a small drive dedicated to virtual memory for OS X? My current system is a dual 2.7 w/ 5.5 GB of RAM, and my virtual memory runs somewhere around 18 GB normally. Whenever Apple gets around to releasing the Penryn Macs, I'll get the top line octo-core w/ 16 GB of RAM, but with 4 times as many cores that's actually about 70% less RAM per core than I'm running now, which isn't really enough anyways. Also, my system at home (an old dual 500 G4) has a 10k raptor as the startup. Besides loading the OS and Apps quicker, is there a noticeable difference in the operating speed using a Raptor on Mac Pros, or does most of the system end up running from RAM anyway?