Loudspeakers that go LOUD?


I recently finished off a basement room that is 24.5' x 22.5' x 8'. My beloved Tyler Linbrook Monitor Signatures sound as wonderful as ever there provided I reign in the volume control somewhat, otherwise the SEAS Excel 7" drivers start to protest. I'd really like to find some speakers that wont give up too much in quality, especially in the areas of treble refinement and in imaging, but will play loud without strain. The few horn systems I've heard sounded peaky in the treble to me, but perhaps there are some which don't. Suggestions will be gratefully received.

Parameters: For music I am into classical, opera, female vocalists like Eva Cassidy and Jennifer Warnes, movie sound tracks, shows, golden oldies, but no heavy rock or metal. Power is via a 50 watt/channel tube amp but that could be changed out. Budget: on the order of up to $3K new or used.
beemerrider
Sounds like a recipe for horns to me. 50 watts harnessed to 100db sensitivity should rattle your dentures.
Sounds familiar. I too have a big room and struggled for a solid year with limited volume thinking it was my speakers. It was only after I changed amps from a 60 watt tubed amp to SS monoblocks that the speakers properly loaded the room and their full potential was heard. In my opinon use the money to upgrade the amps- you've got a great pair of speakers.
I had demo-ed a 40 watt tube amp with my Seas, and couldn't push the dynamics of the speaker. The Seas needs really heavy duty power trans in tube amps with KT90's. Like my JOR. The DA30 would be super!
Remember not all tube amps are built the same.
If you like your amp, try some Zu Druids...60 day money back guarantee. I have Acoustic Zen Adagios that do not ever seem to run out of steam however they are not as efficient as the Zu's. I will be getting some Druids soon for my 2nd system however the Adagios are SOOOO refined they are firmly my reference. These a 2 routes to the same level of joy. My 2 cents and yes, I'm ready fro the flames.
"I'm ready fo the flames" Ok I've got the best why would I want Druids?
Have the Seas, a driver in development for decades. I think the danes got it right.
Vandersteen is still working on "improvements".
I've heard Vandersteens, not bad, in fact maybe the best I've heard in recent yrs,. Far better than Spendor8's.
But they don't hold up well to Seas.