Hi again!
Thank you for the advice of going to the MyCE forums. I found a few threads that enabled me to make what is, more or less, an informed choice. For anyone interested, I opted for a Sony Optiarc AD-7260. Although, to be honest, it is not as though it had features that were far beyond any other available burner. I bought it because it seemed to be a good drive, because there do not seem to be any drives that are better than it, because it supported all the modes which I use, and it was (and is) both easy to find and inexpensive. (Although I would always be willing to pay whatever it would cost to be able to reliably back up my data.)
Thank you again!
A.