<< but with SerialATA right around the corner SCSI will no longer have an edge over IDE >>
It's not just a question of the bus interface, but the drive manufacturing as well....Until we see 15,000 rpm IDE/Serial ATA drives with 4ms seek times SCSI will have the advantage. The problem is the stigma that IDE has in the enterprise market, which is solely SCSI...Seagate could slap an IDE interface on the Cheetah X15, but it would cost nearly as much as the SCSI version, and only power users like us would buy it.
Anyway, I have a SCSI CD-R/CD-ROM, because when I bought them three years ago, IDE CD burners sucked. It's still possible to go SCSI on a "budget"...Get the 18GB Cheetah X15 ($400) for your OS and apps, then get a large cheap IDE drive for mass storage, mp3s, games, etc. That way you have uber-fast access times for your OS and apps without completely breaking the bank.