Have been comparing DVR-A09 and the 716, and the "big" draw to the 716 to me is the supposedly higher rip speeds, even with -R media.
While I am getting good rip speeds (up to 12X) with +RW media,
-R media (which I deal with mostly) still "only" reads at up to 12X.
While this is good, it is no better than my A08, or the A09.
The 716 DOES rip at up to 16X with pressed DVD movies, which is nice, but I don't do much of that. Primarily rip DVD-R made with Set-Top DVDR, for Authoring.
What am I missing ?