7,200 to 10,000 to 15,000 RPM

What're the major differences between these three RPMs? And is it worth spending $115 on a 36.7 gb HD?
http//w/...

Or is it worth paying $100 more for a 36.7gb 15,000 RPM?
http//w/...

Both RPMs sound tempting, and it certainly seems like most people are wanting to switch to these HDs...

The only good reasons to go SCSI are:
1.  Legacy.  You're already there.
2.  Really, REALLY heavy duty video/CG where you need every speed enhancment you can get.

Remember, the faster a drive spins, the more heat it makes AND the more noise.  I'm sitting next to 2 10k SCSI Ultras as I type this.  Trust me.