I recently purchased the 740c and now have over 200 hours on it. Once you dial it into your system with interconnects and a power cord it is an excellent player with detail and clarity. The largest difference I hear in this player that sets it apart from other players is that it unravels the musical lines, other players tend to lump everything together forming a unintelligible distorted mangled mess. I love this player but wish it had a touch more dynamic slam, bass drum kicks are ever so slightly soft which leads me to wonder what the 840c sounds like in comparison. I must add that I had the Apollo several months ago and sold it, even though it uses the same Dac as the 740c it sounds like a very different machine.
Phill
Phill