Danley SH50 - smaller than jubilees, horn clarity & sensitivity and constant directivity 37Hz-24KHz @ -10dB
https://www.youtube.com/watch?v=YuUFmJ2etI4
There are a used pair on Reverb right now for ~$4500.
Getting down to 20Hz, you might need to look into some tapped horns from danley again, or if you or any friends are into DIY, you could save cash building your own tapped horn. I have a friend who actually has been running this exact setup as his main home stereo, and it is absolutely huge sounding, even in a small room.
This is a smaller and more affordable solution than the jubilees. Don't be afraid of "pro" audio for home use.
Good luck and have fun!