Truly an amazing speaker, I used to own the larger NB-1s but these really suffice for the current room, truly no interest searching for another speaker. Signature might resemble the TADs a bit but to my ears outperforms the TADs and Wilsons I used to own....
Wyred 4 Sound's Mini-integrated will give you a lot more power, and all the features you have now (digital and analog inputs) with the convenience of remote control... Of course a tube preamp or amp would be lovely but possibly not as simple.
