In the name of full disclosure, I now have to note that since posting on XMAS eve, I found the amp I have been thirsting to try (Berning ZH270) and so I put my DNAs up for sale. FWIW, it would also be hard to go wrong with the recommended Classe', Bryston, and Plinius, IMO. Classe' and Bryston have great reps for customer service, as does SMc Audio.