hi Joe,
i only owned the original Trinity dac, never the Trinity Silver Reference, or the Golden Reference. so can't specifically help you on any TSR compare.
as far as alternatives, sorry i removed my system link and gear list info a few months back from my posts. i do prefer my MSB Select II to my recollections of the Trinity Reference dac i owned. the Trinity was a significant performance leap (PCM only) at the time i got it from anything i'd heard up to that time. and remains in a high realm of subsequent digital experiences in my mind. it does not quite reach the low noise floor, organic rightness or refinement of the MSB Select II. the Select II is 'bit perfect', and does not upsample, which allows me to play any file in it's native resolution, which i seem to prefer.
i've not heard any digital 'yet' that i prefer to the MSB Select II, but there are some other great dacs out there i've heard. not a dCS fan myself at the top level; it's fine sounding but too processed (relatively digital) sounding (compared to the other top flight dacs) to my ears. YMMV.
other digital to consider would be the Merging Technologies NADAC with the top clock which i have heard and liked, the full blown 7 box CH Precision mono dac which i've also heard and liked, and maybe the new Wadax Atlantis Reference dac which i have not heard.....yet. can't comment on Soulution; heard it at a show but was not overly impressed. was it the system? no useful conclusion one way of the other.
and these days server performance is a significant part of the digital performance equation; i do think that the Taiko Extreme server (which i own) is a standard setter in that realm.
hope that helps.