I'm using an ~8watt single ended tube amp (Dennis Had Inspire). Most here will endorse low watt tube amps like Inspire, Decware, etc.
If you are going solid state, it seems best results are with all class A such as First Watt, Krell, etc.
Class A/Single Ended seems to mate better than higher wattage class A/B. I'm less familiar with newer chip amps, class D.