Eidolon vs Opus

The Edolon's will give you a bigger sound with greater extension in the bass.

I would strongly suggest you listen to the Kharma speakers. They are much more coherent and much more transparent and resolute. They go deeper and are a HUGE step over the Avalon's.

Are you going to CES? If so, they will be shown with the Tenor's and the LAMM's.

Flex: I am not dismissing how good the Avalon speakers are, I am very familiar with them and they are quite good.

I have heard the Avalon's with Spectral, ARC, Ayre, Atma-sphere, and many others and my conclusions were always the same. Personally I thought the best combo I heard was with OTL's.

The Kharma's are just amazing. The Avalon speakers do tend to be on the thin side and do not integrate the bass and midrange as well as the Kharma speakers. As good as the imaging and staging is with the Avalon's, the Kharma's take it up a few notches.

The Kharma / LAMM synergy is quite good, however when matched with the Tenor amplifiers, they are the most lifelike speaker I have ever heard.

MES had the combination of Eidilon's and ARC Ref 300 MK II's. He hated his experience with them. He found the lower midrange to be very bloaty.

As a reminder, I am a dealer for Kharma and not for Avalon. If I liked the Avalon speakers enough, I would carry them.