It seems the better conventional trailers are always in the longer lengths. Those are all 35' long. For a similar sized trailer to the Airstream 25, the Bigfoot 25 rear queen or front queen is a good choice. We didn't go with Bigfoot because there are few dealers in the US. We did see an old one locally and didn't like the floorplan as much as we thought we would. The bath area was tiny. We prefer the split show/bath of our Airstream.
One of the main reasons we decided on Airstream was because of the floor plans they offer in the shorter lengths. We didn't want the typical front bed, dinette in the slide, rear bathroom of most conventional trailers. If Bigfoot offered a 25fb twin layout I'd probably switch.
The one admiring feature of the Airstream, the aluminum shell, frightens me the most when it comes to adverse weather.
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
2010 Tundra 5.7L, Double Cab, 2wd, White