Cheap volume for large room

Thanks for the suggestions.

Unsound -- Klipschorn...looks different...what's the catch?

Btstrg -- The ML Prodigy is only a step above my ReQuests. I really think the electrostats are part of the problem because of their characteristic placement sensitivity. Don't get me wrong, ML is awesome...for small rooms.

Onhwy61 -- basically fill the room over good sound in one area. The ML's sound great but only at a low volume and front-and-center. They don't have any "reach" on the low end. The treble is also bright sounding partly because there are absolutely no soft surfaces in the space. I know there are things that can be done about the overall sound other than replacing the speakers but I feel like it would take way too much building "around" the ML's.

So main goal is to fill the room with a warm sound and enough bass (preferrably without a separate sub).

Right now I'm looking at the Legacy Classics and PSB Stratus Gold. Any others (used) worth looking at for up to $2.5k?

Klipschorn is a particular model from a paritcular manufacturer of speakers incorporating a horn loaded design. The Klipschorn's are legendary. They also prefer corner placement which is not a requirement of all horn loaded designs. Horn loaded designs are notable for their ability to play quite loudly despite modest power requirements. They often have other sonic charateristics that I personaly find objectionable.

If you have two corners, then get some Klipshorns. Esentially the room becomes part of the bass drivers folded horn and you are literally standing in the speaker. They have quite the following and you can play with low wattage tube amp designs and tweak them to your liking.

Your neighbors may not like you though ;)

Tyler Accoustics...always some used or on sale items and a pair of 7Us or better, Linbrook system II should do the job well. Both are currently on sale on Agon for less than $3500. (not affiliated with Tyler by any means...just the best value on speakers today, period).

Your room is 21,000 cubic feet. None of the speakers recommended are designed for full range reproduction in such a large space. Your room is three times larger than what most manufacturere would consider a large room. Your goal of room filling sound without a separate subwoofer is unrealistic at your budget level. I COULD BE WRONG, but you should contact some of the manufacturers named and ask them about recommended room size and sould levels.