I did some more listening this weekend, as I upgraded to a Panasonic dmb-bdt500 BD Player, connected to my receiver via 5.1 channel analog output. Wow! The high res soundtracks on movies really open things up! These speakers sound excellent, in my opinion. The sound stage is very open, surpassing the speaker locations. Howver, for the type of bass that I love, you definitely need a powered sub, which most people either have or would add anyway.
There is a lot of detail in the high bass, low midrange to upper midrange frequency. Same goes for the highs. I actually lowered the treble just a bit (may not be the speakers, as my listening area is very bright to begin with). The low bass, from the towers, is very tight and musical, but as I mentioned, for movies, I like the sub to kick in. Speaking of the sub, it blends very well with the towers (more so than in my last set up, which sounded more boomy by comparison, with the same sub!). Everything just sounds more complete, cleaner and crisper at high volumes.
I watched Jack Reacher on BD and it sounded great. There's some serious gunplay in the beginning of the film and towards the end, which really sounded fantastic and energized the room. I played some key scenes from the Hulk, Live free or Die Hard, listened to some operatic tenors and pop music.
The speakers sound best with classical, instrumental music, R & B, jazz, hip hop and pop rock tunes. Heavy metal sounded a bit bright and fatigued at high volumes, but that could be my acoustics. I didn't hear anything that I would describe as "muddy or dull", but then again, I don't have an AB comparison to other speakers set up with the identical parameters.