What does one purchase after owning horns?

If I could handle them, very big and expensive horns and a good flea powered amp are the only thing I would consider as an alternative to what I have, larger OHM Walsh speakers running of the most powerful yet compact and efficient Class D amps I could afford.

This approach is the total opposite of Avantgarde, but as such it achieves very excellent results using lots of power and muscle.

mbl 101s is another radically different approach that might also achieve results that raise the bar.

Neither will sound like Avantgarde though. Very different!

Another speaker design that can raise the bar in the right application in the right room (generally larger) and with the right amps are large multi-driver line source designs.

I am currently using Beauhorn Virtuosos with Wavelength 300b or 45 amps, and I'm extremely happy with this set-up. Either combination can easily overpower my small apartment. I will be moving within a year to a house. I plan to then utilize my JBL 4550 horns. 300Bs on bottom and 45s on top with an electronic crossover. My additional plan is to be staying with these.

Renmeister, when you owned your Unos did you ever consult with Jim Smith regarding the woofer integration? As the former but longest running importer for Avantgarde in the US, he likely knows more about them and their proper set up for optimal performance than anyone.

Most anyone who has considered any model of Avantgarde knows their reputation for importance of set up. I certainly have not heard a large number of horn speaker designs but I will say the AGs I heard set up by Mr, Smith sounded more like live music than about anything I experienced, and without the typical horn colorations.

I appears that the answer to the original question is this: better horns.