Thanks all. Apologies if it wasn’t clear in the first post but I definitely need disc brakes.
As mentioned above, availability is currently a major issue and will influence my final decision. Have had a look at the Enve’s but not keen on waiting until August!
On the shortlist at the moment is Campagnolo WTO 60, DT Swiss ERC 1100/1400 and Zipp 303 firecrest (local bike shop chasing up stock for me). I can’t find stock of HED or FFWD wheels.