-
I've got a few wheelsets built with Archtype rims. Nothing wrong with them, but the Kinlin XRs are better IMO, except for the more limited range of finishes. There's also the Ambrosio P20s. Some people have had issues with them, although in my experience they're fine if not as well finished or round/true as the Kinlins. However, I think they've been discontinued, so Kinlin it is.
Does it have to be 20mm internal? The Kinlin XRxxT rims are 19mm internal, and there's little not to like about them. The XR31T is pretty much my default choice for alloy rims. I only get other rims due to feeling perverse/wanting a change/crazy bargainz.