Plextor has 2 models that can do Safedisk without Beta Blocker
The old SCSI PX-R820 (SCSI) made after February. firmware must be 1.07
And the new 24/10/40A (IDE)with burnproof and powerrecII
The first one isn`t made any more.
So if you want a new drive there is only one choice and it will be the IDE one.
Like you said it is not about speed. If I would buy the plex or the lite on 24. I won`t burn at 24 speed. But just at 16 max because I don`t want gaps. So I can`t use CD-R's for mastering.(See Z-CLV vs P-CAV topic by THONK
It is just that it can do anything I want.