Ceramic speakers always worked best with tube amps, I loved Einstein OTL monoblocks on the Marten Coltrane. But for the Avalons I would suggest DMC 15 and DMA 250.
I pulled the trigger on Atmasphere with Avalon as well. This is based on several sources of info. I've got the amps, but still waiting for speaker delivery.
I have the Indra`s and use them them with a Shindo Montrachet push-pull tube amp (40 watts class A) and have no trouble playing to ear splitting levels. The dynamics are very good.
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