Thanks, Jack. I agree that I should keep the C15--the only possible advantage to the C10 (went my thinking) was that it is quieter, I believe, because I don't believe it has a hard drive (?). So I might conceivably locate one closer to my listening seat, whereas I keep the C15 over on an equipment stand (and use the iPad app from my seat). But the economics probably don't make sense and there may well be other advantages to the C15 over the C10, as people have suggested.

Jerry

Sooloos C15, 2x2TB TwinStores, Meridian 808.5, BSG Tech QOL, Allnic L-5000, FirstWatt SIT-1s, Zu Dominance; Modwrighted Oppo BDP95, Classe SSP-800, Sony VPL-VW50 Pearl.