Thank you for your input. I agree there are quite a few good 45, 2A3 and of course 300 B SET amps in the 2-8 Watts range but I am not certain this will be sufficient power for my needs. I will get an Audion Silver Night 300B in my room in the near future and will be able to see how it comes along with its 7-8 watts. but currently I am thinking more in the 18-35 watts range.
Many of the brands relatively well known in the US have little presence over here, for example Sophia Electric, Audion and even Melody (I think currently not distributed in Europe) and I am hesitant to mail-order one just based on forum reviews. I would assume that the Soul has less power needs than the Definition, is that right? If someone could let me know whether I need to look for something different on the Soul Superfly as opposed to the amp needs of the Definition speakers that would be very helpful (for example, does Black Shadow or other 845 amps or a Quad II Forty behave as well on the Souls as on the Def?).