Thanks, Two Degrees. Interesting that you feel the 712A may be more reliable (?) than the 716A.
I have had a few Plextor CD burners (and was very happy with them), and the 2 year warranty influenced the purchase decision.
I have an NEC 3500 and LG 4120 (likely to be replaced shortly by a 4163), so the extra speed of the 716A is less of an issue.