Too bad Elapsed isn't lurking around. I don't know Naim well enough to recommend anything, they just seemed pretty hardy driving Dyn's and their own speakers. Dyns like current but actually their impedance is relatively stable. Maybe Maggies are the real test. Our defunct Maggie dealer used to drive them with Levinson and lesser systems with Adcom.

I think you could get away with some Krell 250 watt monoblocks. I heard them drive the Evidence to concert level SPL and remain crystal clear.

I hate to make generalizations but I've heard the claim that class D can't drive difficult loads way more than once. Then again, my Linn drives 5 Dynaudio and hasn't shut down or distorted, well, yet again, I don't know how much difference it makes but Linn calls theirs class V. The Onkyo 9555 got some criticism for not being able to drive difficult loads but I don't see how an amp that good at $400.00 could be criticized at all.

You could try the ARC 150x2 digital amp. It has some weight to it for a digital amp. I wish when I had it to play with I would have tried a different amp to see what difference it would have made in sound. I don't know how it does at low impedance either.