I too have an appreciation for low watt solid state amps and I use an Arcam CX Alpha 5 integrated amp, which is rated at 45 watts rms. The built in preamp of this unit is exceptionally clean and simple so that it impedes as little as possible the output and runs very cool. However, regardless of its low wattage, as in the Dynaco, (which are amazing as you say) the Arcam easily drives fairly heavy loads, as in my Def Techs. The earlier Arcams (say 1988 through the mid 2000s) were still being made in the UK, and I'm not sure about present models. I think that these are fairly accessible on Ebay, etc.