The problem is those who have not actually heard better pro gear don’t know how good it is. It was funny to see expressions on peoples faces when I had sets of KPT-456’s for sale as they heard them for the first time. I had a really sweet Chorus I with upgraded crossovers and a MAHL tweeter in there. Normally they would have sold quick. I also had the KPT-456’s at the time ready to go and I play whatever I have on hand for Craigslist people that come over. They would hear the Chorus which they came there for and then ask "what is THAT?". So with a grin on my face I would tell them and then play them. The Chorus was $1,200 and the 456’s were $1500 and that set of Chorus speakers sold four sets of KPT-456’s before they left.
That set of 456’s was 18" deep, 27.75" wide and 55.75" tall. So little more than a Cornwall on footprint although much taller. Total cubic inch footprint less than a La Scala. 800 watts output on bass bin and 75 watts on the 2" horn top and unbelievable fidelity. It beats ALL the Heritage including the KHorn and this is why I talk so much about pro. At any volume these just sounded much bigger and better. My normal listening level by the way is about 80db. When I want to sit next to the 32’ organ pipes it gets louder. No veneer and scant WAF and I get all that I just don’t have to abide by that.
Heritage and Vintage Klipsch is the real deal compared to the rest of the market in value for dollar spent I believe. Once you step up to Klipsch Pro though it is a different ball game.
Considering the OP’s original inquiry here is something to think about. The KPT-456 is 104DB efficient and the newer version of the same which is the KPT-904 is 105db efficient.
Way beyond the OP’s amount to spend but have you heard the Cornwall IV yet?