Welcome from Colorado: Now you can be a contributor as well as a reader. I like the 25' Excella, seems to be a perfect size. I have a 1975 Overlander 27'. The extra 2' isn't much of a bother. But mine is a rear bath layout and I think the mid bath works better for most folks.
Many, many folks with older Airstreams have sun faded clear coat. Some call it male pattern baldness. I have stripped the old clear coat off of 4 old Airstreams I have owned through the years. It does mean you might want to wax the trailer every year. But I do think stripping faded clear coat makes the trailer better looking. Or you could spend many mindless hours behind a polisher and make the trailer look a bit better.
Here is my vintage 75 Overlander. Post a picture of your rig when you can or if you want.
WBCCI #8607 VAC Region 11
KnowledgeBase trailer renovation threads: 69 Globetrotter, 76 Sovereign, 75 Overlander, 66 Trade Wind Such fun !