The Class D have 100W into 8 Ohm and 200W into 4 Ohm. I am not sure if it is a logarithmic scale, but somewhere between 100 and 200W should have no trouble with pushing a 90dB speaker. AN lists your speaker at 94dB, btw.
The Class D have great bass, imo.
If I had less sensitive speakers, I think I would be 100% satisfied with the Atmasphere Class Ds. I have, however, owned 97+ dB speakers since my first foray into real HiFi, MidFi if you are going by price??, but I would put my system up against about any other for my taste. Rethm Maarga were my first real speakers.