Hi Vince - I have heard the Denon S1 series monoblock set including the pre-amp. You know what level I'm at, so belive me when I say that this set is really good!!! The finish is also among the best I have ever seen - especially on the monoblocks. Compared to my TacT Millenium the sound is a litle to the dark side but still with the same amount of details. The dynamics are great and there is more power than you will ever need for "normal" speakers. The bass is a litle to boomy compared to the TacT - but compared with other analog amps I would say it's amont the higher reference class... If I saw them at a good price here in Denmark I would seriously considder purchasing them...