The thing with SET amps I think is they clip and distort in a less harsh way than SS amps. That allows them to go louder than one would expect off a few watts.
Regarding SS, I think you have to throw the kitchen sink current-wise at speakers like these in order to max out the performance. My OHM speakers are similar. Less power and more current can trump more power but less current. I've found the Bel Canto enhanced IcePower designs accomplish this as good as anything. The sound is not unlike some more neutral sounding tube amps I have heard, but not tube like in the euphonic sense that many enjoy.
Regarding SS, I think you have to throw the kitchen sink current-wise at speakers like these in order to max out the performance. My OHM speakers are similar. Less power and more current can trump more power but less current. I've found the Bel Canto enhanced IcePower designs accomplish this as good as anything. The sound is not unlike some more neutral sounding tube amps I have heard, but not tube like in the euphonic sense that many enjoy.