Aks434, "From Newbee's mail it sounds for serious listening Primaluna is not adequate." Whether it is adequate or not depends on your expectations, your speakers, and your wallet. FWIW, I just took a 3 week vacation, came back and turned on the One and was floored by how beautiful it sounded - sort of wondered why I even needed my other stuff. If I didn't have it I probably wouldn't really miss the more elaborate stuff that much. I have the Three and Five as well - in comparison to the One the One is warmer/fuller in the bass and lower midrange. Not a bad thing if you have neutral to cool speakers or room. Overall, especially in view of the price, this is an excellent amp. I've also made tonal changes in the One by changing out the power and small tubes, using only current production tubes. I think that the One sounds a bit more like an older type tube amp. You might consider the Two - for a few more bucks you get a faster amp with a more detailed sound and a lot more options regarding power tube choices. FWIW, I've not heard the TAD equipment, but I'm a bit put off by the way they have been marketed.
