I personally look for drives that can do error scans so I can find out how good the burns are. Just playing the burned disk tells you nothing since the ECC codes can correct errors. The disk can appear to play perfectly while underneath the hood the there are so many errors that the ECC logic is just barely able to reconstruct the data, and any further degradation means your data is gone.
The last drive I bought that has error scanning capability is the LiteOn IHAS422.
Some drives simply do not support disc quality scans. Others, like some Samsung models, can do the tests, but are blocked in the registry from using the program. (an easy fix by the way)
I see it. Are you saying that if I just remove, say, "SAMSUNG" from this string then NERO will be able to do an error scan with a Samsung drive? That will be very handy to know about then next time I'm looking for a DVD drive.