All valid points. Think I’ll avoid tubeless for this one if I intend to stick road tyres on occasionally. Swapping around tubeless tyres can be a bit of a ball ache.
Seems to be Open Pro CD or Crests for me then. This was a worthwhile thread since I had previously dismissed both.
If I can live without 25c tyres (or if BWD can confirm me that 25c will be okay on Crests), that is a handy option, as they are a lighter rim than the Open Pro CDs, and being able to buy Hoops will probably be easier and cheaper than a custom build. Otherwise, the Open Pro CDs look quite smart in grey, and seem to be the way to go for a custom wheel build for narrow tyres.