@richh84 So...this is tough. My feeling is the Playback MPD 8 with the MPT 8 transport is going to give you the most musical experience. There is something incredibly musical and soulful about the Playback DACs and they are at their very best with the matching transport as that is best support for PLink.
That said, if soundstage is the concern I would lean towards Aries Cerat assuming you are not interested in DSD playback. The Aries Cerat has a bigger image and dynamics are extraordinary. It lacks the soulfulness of the Playback but makes up for it by delivering a jaw-dropping image. If you are into DSD and wanted a similar image I would look at the EMM DA2 v2.
For detail, the Weiss Helios is insane. I have never heard better separation of instruments and within an extraordinarily deep image. This will give you string instrument renders that are as good as I have ever heard.
Based on your priorities above, Playback would be what I would go with but I suggest the others as there is a balancing and tradeoffs even at this level. In all cases, each of these units needs to be matched with an exceptional server to get the most out of them and that will vary, even among the three above