I'd like:
(1) Conveniently remote-adjustable balance control since I'm listening off-axis more often than not. I know remote balance adjustment can be done via a confusing procedure involving the Guide, Set, and directional buttons, but I said "convenient".
(2) Ability to configure input levels on all sources, as Tweeterman has suggested - especially since I have to raise the volume when playing records. Of course 10db more gain from the phono preamp would take care of that too.