Firstly, here's Miller & Kreisel's web site which has been up and running for almost a year now:
http://www.mksoundsystem.com/
A Beginer - the reason you were wowed by the M&K's is that they're designed for a completely different purpose to most 5.1 systems. The average sub/sat package is designed to fit in with decors, look good for the wife, and sound acceptable with music and films. M&K's, as many people will know, produce monitor speakers supplied to movie mixing/mastering studios. Many films like King Kong and Pearl Harbor were mixed on M&K speakers, which do sound different to hi-fi speakers, which sound smoother and more polite. Openness and detail tends to lack through hi-fi speakers, but through the M&K's, movie soundtracks tend to come to life and you find yourself much more involved in what your watching.
There's no trickery, just quality speakers designed to do a specific job. If you spend £200 on a PC printer, and £200 on a PC printer/fax machine/scanner, which do you think will perform better? Anything designed to do more than one job is a compromise. M&K's are designed for movies. Having said that, I feel they actually sound pretty good with music too, giving something like Nirvana the sort of edge it deserves rather than softening them. Each to their own though.
Anybody looking at a quality home cinema system should audition M&K properly. If it's not your cup of tea, fine, at least you gave them a try. Many who tried M&K for the first time were instantly converted, myself included. I have never gone back from M&K, and hopefully will never have to.
M&K isn't just about big bang movies. Even comparing quiet, slow paced films can show the difference that M&K makes. You're just so much more aware of little things you've never heard before. You could argue they're there already, but the fact that the M&K's introduce you to these details says as much as most people need to know.
Anybody looking for music reproduction as well from their AV system should look at the M series, 750 series and 150 series. I've found these sound fuller due to using larger mid drivers, and having a larger cabinet volume. Anybody looking for more discreet systems can look at the Alpha (K Series) or Xenon series.
Cooney, it would be interesting to hear which amplifier was used for the demonstration you attended, whether any Room EQ was used, and whether both sets of speakers were individually set up or whether they used the same settings for both speakers. An EQ'd set of speakers can sound considerably better, so make sure both sets had their own EQ settings used.
I recommend anybody to get themselves along to an M&K dealer and give the BluRay of Cloverfield a spin.........but I'd also recommend you leave your credit card at home too