When you want to do audio-copy on the fly with dae, you need to consider the minimum dae-speed of your reader. When starting up the cd, the dae-speed is a lot slower then when reading the end of the cd…
When you check this review of dvd-players:
It shows you that the fastest reader can extract dae at 22,23 speed when starting the dae session, and ending with a dae-speed of 47.50. So in theory it should be able to do audio copying on the fly at 20speed!
So this is what you need to consider when you want to do high speed audio copying on the fly. Look for reviews where they test this!
Scsi or ide? To my opinion nowadays with the fast ide-controllers and fast cpu’s the advantage of scsi for the home-user is minimal, so go for the cheap option: ide.