So I'm thinking about getting a 10,000 RPM hard drive without going SCSI. That basically means a WD Raptor. Anyway, what I'm confused about is the difference between SATA-150 and SATA-II? Because the Raptor uses SATA-150 and my mobo has connections for SATA-II. I've never used Serial ATA before, so I don't know much about it. Any HDD whizzes out there?