Dignan, one other thing. If you decide to go SATA, and go for a large drive instead of the Raptor drive, maybe you should consider going for one of those new Maxtor Maxline III hd's. They go up to 300Gb, but more importantly, they have 16 mb of cache and support native command queuing. I've read several reviews about NCQ, and the speed improvement that can be gained by using this is in some situations as big as when you make the jump from a 7200rpm drive to a 10.000rpm drive. Just read this review on Anandtech about it.

Maybe you can have your cake AND eat it too. Of course, this WOULD require you to change your motherboard to a chipset that supports NCQ, OR buy an expansion card that does. But in any case, it's something worth considering.