The Levinson 20.6 is an older design and in our opinion would not be a good choice with either speaker you mentioned. The 33'S would fit in with the Wilson's, but would not be recommended for the Avatar. Is that the correct Avalon model?
The Avalon Eidolon or the Opus would normally be the choice w/ the amps your considering. The Levison 33H amp is a fine amplifier but it's tonal balance would not be our first choice with these speakers. A high speed ultra-linear design would make the most of the quite different but interesting speakers.
The Avalon Eidolon or the Opus would normally be the choice w/ the amps your considering. The Levison 33H amp is a fine amplifier but it's tonal balance would not be our first choice with these speakers. A high speed ultra-linear design would make the most of the quite different but interesting speakers.