It occurred to me that the system at FLAX I heard was using Novacron amplifiers at rev 3.3, whereas my amplifiers were at rev3.1. For the small cost of updating to rev3.3, I figured I'd give that a try before changing speakers. Having the amps back for a while now, I can say I'm very impressed with the results, and that the upgrade gave me a significant helping of the sound I was looking for. The sound after update is much more open and dynamic. I'm quite shocked at the difference. I thought the amps were pretty good already. The increase in dynamics seems to be due to a reduction in noise floor, rather than an increase in peaks, if that makes sense. The system is more satisfying when played at low volumes now. Bass also seems more controlled and tighter. The overall impression is that the music sounds more powerful and vivid across the spectrum. More detail can be heard from the very deepest bass through the highest frequencies, but without being fatiguing. I did notice an increase in high-frequency extension, which I was surprised at. In my case it worked out well. My speakers have a switch to help match the speakers to the amplifiers. I had it set in the position that boosts highs a bit. Since the update, ti sounds more natural with the switch in the normal position, and now sounds better than before with the switch in the other position. The increased resolution is not a result of simply boosting the highs, but is a real improvement across the board. I'm still contemplating a change to Classic Audio speakers, but am less urgent about it than before.