I would say the McCormack DNA-2 or 2DX are the most under rated amps in the world. It seems that a huge number of DNA.5 and DNA-1s were sold, but ulike these smaller McCormacks, the DNA-2s were never reviewed by a major mag. and they were being produced about the time the company was "going under", so it simply didn't get much publicity. But I've owned the 2DX for 2 years now and it's a fantastic amp-- they can drive anything and still have great finesse. Also, because they aren't well known they sell for pretty reasonable prices on the used market. I greatly preferred the 2DX to the Levinson 331, and SF Power 2. Cheers. Craig.