Couldn't say which is the better reader out of all, but I've had a 716A and a 760A and both of them suck as readers.
I've even burned CDRWs with them that they subsequently couldn't read fully, but my ancient Pioneer slotloader could!
And the 760A seems to get hung up on newer copy protected discs - Yet again I had to crack a game (This time NWN2; 760A wouldn't even read the DVD!) just to play it!
(To be fair, not all their fault; Plextors are very picky about standards, and since copy protection means breaking of standards...)
They're fantastic burners, but mediocre readers.