I'd like to knock the price, since $450 seems like a lot for a little headphone amp/DAC, but you get what you pay for, especially in the high-end audio world.  And, in my opinion, this is a great product.   I am just getting back into high-end audio, building a new kit.  The first things I wanted to do were to digitize my CD collection in lossless, build a media server with direct digital out, get a really good headphone amp/DAC and good headphones.   After a long search, reading several forums, I bought the following:   Sennheiser HD650...