You do not need 100-250 watts to drive those speakers! The whole point of horns and high efficiency is to allow you to use better lower powered amps. I would be far less concerned about monoblocks versus bi-amping and more concerned with finding the right amp. These are some nice looking very high quality monoblocks:
https://www.audiogon.com/listings/tube-highly-modified-2018-01-04-amplifiers
Also it looks like Odeon speakers were initially imported by Axxis Usa longtime importers of Air Tight tube amps from Japan. Presumably the two brands would work together well. From the listings:
https://www.audiogon.com/listings/tube-a-reference-tube-amplifier-2018-01-06-amplifiers
Awesome looking speakers btw I bet they sound fantastic! Good luck and have fun!
https://www.audiogon.com/listings/tube-highly-modified-2018-01-04-amplifiers
Also it looks like Odeon speakers were initially imported by Axxis Usa longtime importers of Air Tight tube amps from Japan. Presumably the two brands would work together well. From the listings:
https://www.audiogon.com/listings/tube-a-reference-tube-amplifier-2018-01-06-amplifiers
Awesome looking speakers btw I bet they sound fantastic! Good luck and have fun!