The Ref Transport review is scheduled to follow the (imminent) Studio Player review.
As regards available high-res material, my main issue is and always has been, that the artists I want to hear are by and large, not available from the labels you mention. I'd rather listen to Shoji or Batiashvili on CD than Duenas on SACD or any number of alternatives on a high-res file. I buy by performer and performance, rather than by format. If I can get the music I want on SACD, I generally will, but as with all things, there are good and bad SACDs, good and bad CDs, good and bad high-res files.
However, if you suggest more than a couple of examples of high-res files and their disc equivalents, let's see what we can do to facilitate the comparison. One complication I foresee is the requirement for a second Reference PSU (as both the Server and Transport can be used with the external supply and, having heard whhat it does to the Server, I'd definitely be looking to use it with the Transport). All things are possible - it just takes time and intent...