Both amps should be fine, as specs show they can both approximately double their wattage from 8ohms down to 4ohms, I like amps that can do this, as they would have good current drive to drive speakers with nasty dipping impedance loads and large negative phase angles, not that the Eclipse has these, but they are very inefficient.
The Classe has a few more watts up it's sleeve and with the Avalon Eclipse this could be a small advantage if you listen LOUD because they are only 86db efficient.
If you don't listen at huge levels then it would come down to which you prefer the sound of.
And I love amp manufactures that give their amps high input impedances, 75kohm for the Classe and 100kohm for the Ayre, as this lets many tube preamps and passive preamps able to drive them with ease, and not get loaded down, and those who know me, know which way I lean there.
Cheers George
The Classe has a few more watts up it's sleeve and with the Avalon Eclipse this could be a small advantage if you listen LOUD because they are only 86db efficient.
If you don't listen at huge levels then it would come down to which you prefer the sound of.
And I love amp manufactures that give their amps high input impedances, 75kohm for the Classe and 100kohm for the Ayre, as this lets many tube preamps and passive preamps able to drive them with ease, and not get loaded down, and those who know me, know which way I lean there.
Cheers George