I would concentrate on the K-horns or Volti VITTORA. I built my system around the LaScala A-2s & changed the top end to, Altec 311/60s with 902T drivers. The M55 driver didn't give me the sound I was looking for. I even change the tweeter 3 time & settled for the Fostex T925. I also upgraded the crossover to ALKs- extreme slope network, so I can dial in the Mid/top ends. I'm still running a little hot on the mid, so I have to get off my ass & add a resistor to the mix.
The newer models give you the choice for tri-amps the speaker as you already know. So IDK if the Volti are in your budget but, I don't suggest to buy them until you have a listen. Welcome to the Rabbit hole.

