Excerpts from emails received from a satisfied e20 customer: 

 ...The e20 (mated with J. Rivers Media Center software) performs competitively with current DSD capable USB DACs in the under $15,000 market. Yes the last statement is correct.

...In summary the exaSound e20 is superbly designed, very musical yet accurate and truthful, easy to set-up with J. Rivers Media, and is very trouble free.

...More dynamic; Close-miked; more-exciting; not laid back.

...It is a very truthful, very immediate, and a modern sounding DAC with unsurpassed specifications.

R.S.