I'm going to be demoing some speakers over the next couple of weeks starting with the M&K 150thx this weekend. I wanted to know what you guys suggest taking along to demo a set of speakers. I'll be ~80% movies 20% music on these things, so I want a very good movie test. Most of my musical taste are very midrange focused around acoustic guitar levels. I'll probably take the Fleetwood Mac DVD for guitar testing. What else?