IDE is actually being phased out on motherboards and many newer motherboards have only 1 channel, with future boards likely to have none.
Optical drives are finally going over to sata now (not for performance really, just convenience), so you can expect IDE to disappear completely in a few years time.
Bearing this in mind, and the fact that sata drives cost about the same as IDE drives, and its more convenient, i can't see any reason to get an IDE drive.