Consider a used Bryston. I had a Bryston 3BSST on Magnepan Tympani II and MG IIIAs, which both sounded wonderful. The SST even drove new Quads reasonably well. Haven't tried the previous ST series or the later SST squared, but the first series, 3B, is dull by comparison.
But I have also used DIY 40WPC Class A on an MMW-DWM combination for the HT, and it too sounds wonderful.
It's the quality of your power, much more than the quantity. JJSS is absolutely right - the speakers are a high end product, and precisely transmit the signal they are given. That is where you need to spend money - on your electronics, not cables, not speakers.
IMO.