I just received this new unit, ordered via Amazon.com yesterday. So far, I have been listening to DSD64 files (DSF's) purchased online - plus those ripped via PS3 from my SACD collection. Headphone listening only thusfar - with my Schiit Valhalla/Senn 650 combo and my Grado RS-1/Grado RA-1 amp. Very good sound; better than my Schiit Loki, for sure. I haven't placed it in my big system as yet since my wired network is in a different spot, and still have a lot of files to move over. Speaking of which - the Sony "HAP Music Transfer" application leaves a lot to be desired, in my opinion. You can only sync a folder - rather than select subfolders (i.e.: albums) to transfer. And since there is a 100 subfolder limit on each sync - and I have over 300 albums each in it's own folder, it has turned into as bit of a pain.
Any other HAP-Z1ES owners out there with suggestions, tweaks or other relevant comments? Would love to compare notes.