Best amp for Coincident Total EclipseII

your probably onto the fact you want a more romantic warm sound paired with those speakers as they can be revealing and harsh on many amps.

I think Israel voices his speakers with his own amps now... I think he used to employ Manleys... but he is a fan of 300B SET output amps.

Your own preffs may well differ from his intentions but remain in a more warmish tilt, as Chad said.

I'd say at any length however, tubes are the way to proceed.... maybe try some EL34 amps. you can configure them to either side of the fence... warmer, or moure neutral and quick.

Israel has a set of MA-1s. Most of the speaker line concept was developed in the late 90s when he had M-60s.