Dream bike and all, either rim will give you the service you'll want. As for durability, besides the wheel builder's contribution, I think there are enough riders who have put some longterm miles on A23 rims (like valleycyclist) to say that they are not easy to trash.
If it's a cosmetic thing, well then that's a choice to make
as for performance and ride, the rubber, tire and tube, you put on will make the real difference.
ultimately, if you have more than one bike, you may find that you like the wide rim enough to dump the narrow rim wheelsets and get some more wide rim sets... hence another opportunity to decide on HED.
if , however, the wide rim doesn;t do it for you, then maybe you won;t feel so bad about not having spent more on the HED C2s.