They have mentioned most I would vote for. If people want a speaker demo down in the HT room, I usually start with Hell Freezes Over. The detail is uncanny. It's starts with Hotel California so you hear individual instruments right off the bat. This seems to help get your ears adjusted and they don't have to fight to hear the detail through a big opening rift of multiple instruments. Then some nice echoing hand drums kick in, then everything starts to blend together. It's also a song everyone has heard to death on their crappy FM car radios so the difference is quickly apparent.
OK, so I'm playing the physiological game a bit but it is still up to the music and speakers to make the final impression.
Another I'll add is that if you have someone who wants to hear something Kick-A__ rather than subtle, Nine Inch Nails, Beside you in Time
DVD has some tracks that that amaze even people who may otherwise hate the group. I wouldn't call it reference but definitely impressive for this type of concert.
I'll start off with the opening keyboard sequence from March of the Pigs because the shirt vibrating bass and authentic sound makes you feel as if you entered the night club from the XXX movie. (The Vin Diesel movie, not porn...) Usually stick to just the opening because many wouldn't like the whole song.
If I can convince them to listen to a few of these, Closer, Wish, Only, Hand that Feeds, and Head like a Hole.... they usually get so wrapped up in the great sound and the energy that they actually become NiN fans. (unfortunately they often go out and by CDS and then get disappointed by all the distortion they add into their CD versions but the live stuff is very distortion free ((well mostly))).
Oh, and it's just been released in HD-DVD with Dolby true-hd 5.1 digital surround sound. I don't have that yet, but I will.
If the listener is a guitar player, the new Dave Matthews and Tim Reynolds DVD is a MUST HAVE! Just the two of them, no backup band. Dave in the right speaker and Tim in the left. You hear every scratch and vibration of the strings.
Finally, It's not concert DVD's but some of the classical picks from JohnK and other folks here sound amazing when using multi-channel. Even non-classical lovers will appreciate the sound and dynamics. If it's dynamics you are looking to show off, Classical is the best way to do it. I owe him and others some reviews from their assistance with choices but I bought a bunch at once and haven't had time to critically listen to them all in full. Add in that some were multi-disk sets and I've been overwhelmed.
Sorry for the long post. Place the guy at the other end of this super boring conference call.