SCSI is more flexible than IDE (7 devices per controller rather than 2). It deals with multiple read/write requests better, which is why you find SCSI hard disks in file servers rather than IDE. The first generation of SCSI CDRs generally worked better than IDE. But for a single-user, non-network situation, a new IDE CDR drive will work just as well for you as SCSI. Go with SCSI only if you intend to have a real boatload of devices on your PC (muliple CDs, tape backup, ZIP drive, etc.) And you WILL pay more for SCSI devices.