It's not modern, and it's not an Airstream, but I've got a 33' Spartan park model. I'm currently making it into a tag-along camper, and restoring / replacing the birch interior.
I think that Airstreams made after sometime in the early '70s were skinned with something besides Al-clad, and were Plasitkoted, so there's no polishing needed. I believe they now even have power leveling jacks, power tongue jack, and axles that look like Dexter Torque-Flex units but are made by someone else. The interiors are nice, but it seems that many of them had the lav in the rear of the coach, and the twin bunks in the middle which seems sort of odd for a floor plan. I'm not sure when those were made, but it seems that they made more of them with the aft lav than without. There are ones out there that have an aft bedroom, and the lav in the middle behind the kitchenette, which are sought after.