Comparison between Antipodes DS, Naim Unitiserve and Music Vault Diamond.

has anybody ever compared, owned any of these? can you help a person out trying to decide between the three?
ease of use, sound sound comparisons, etc.
i'm interested in purchasing one of these. to me expensive does not necessarily mean better.
I have a Music Vault Diamond from 2013 and love it.  Neal from Sound Science provides personal service and takes the guess work out of computer audio.  I have mine paired with a Luxman DA-06 DAC and the sound quality is better than any CDP I had owned previously.
everybody seems to think highly of him.