And now for a highly unorthodox option...how about buying an in-car sacd player such as the Sony MEX-DV2200 and powering it via a DC transformer and connecting speakers to it. It doesn't seem to have a headphone Output, but does m/c decoding! I think it's out of production, so you'd probably have to buy a used one. There might even be another in-car sacd player that does have a headphone output, I don't know, the Sony was the first option that came up on Google.