Why do you need SCSI?
Buffered interface could be a great idea, it can be tricky to match a slim DVD/CD with a 2.5" HD or CF-card on the same cable.
IMHO internal slim DVD/CD is not worth it, yes it looks cool but you can just as easely just get a PCMCIA->CF adapter, install win filesystem and transfer files over on a 4 GB CF-card. Less is more.
(the same could be said about USB to)
