One other possibility occurs to me - with those powerful amps, you could drive a pair of Sound Lab Millennium-3 full-range electrostats. This is Sound Lab's smallest full-range model. The only issue would be the size of the speakers, but Sound Labs are legendary for their world-class inner harmonic detail and natural timbre.
Since the Sound Labs approximate a line source rather than a point source, they have a certain characteristic that makes them especially well suited for large rooms: The sound pressure level falls off more gradually with distance than it does for a conventional speaker. This sets up a sound-field that just "feels" more like what one experiences at a concert. In my room, for example, a point-source loudspeaker's output falls off by 11 dB as you move back from 1 meter to 8 meters, but the output of the Sound Labs only falls off by 4 dB over the same distance.
Now, if you're looking for very high volume levels, the Sound Labs aren't for you - they're definitely a finesse speaker, a quality-over-quantity speaker. But they do some things probably better than anything else out there, and some of those things just happen to be among your priorities.
These smaller Sound Labs are easier to ship than their big brothers, and in a week or two I'd be able to offer you an in-home audition on a pair.
Since the Sound Labs approximate a line source rather than a point source, they have a certain characteristic that makes them especially well suited for large rooms: The sound pressure level falls off more gradually with distance than it does for a conventional speaker. This sets up a sound-field that just "feels" more like what one experiences at a concert. In my room, for example, a point-source loudspeaker's output falls off by 11 dB as you move back from 1 meter to 8 meters, but the output of the Sound Labs only falls off by 4 dB over the same distance.
Now, if you're looking for very high volume levels, the Sound Labs aren't for you - they're definitely a finesse speaker, a quality-over-quantity speaker. But they do some things probably better than anything else out there, and some of those things just happen to be among your priorities.
These smaller Sound Labs are easier to ship than their big brothers, and in a week or two I'd be able to offer you an in-home audition on a pair.