Whichever one you chose, be sure to check for the rear separation/sag. This was common in pre '79 models. Also no matter how good the interior looks (looks can be deceiving) you still need to check the sub-floor for rot. Go around the interior edges (under windows, in front of door,anywhere you can get to, etc) with a screwdriver, pull up any carpet/flooring and stick it in to check for rot hiding underneath. Do the same in the exterior compartments.
I'm sure others here will have more good advice. This is just for starters. Remember on the portal home page, on the right side there is a link to where you can find someone in your area who will come and help you do an inspection on the important things to look for. Wouldn't hurt to get a second set of eyes.
We have a Sovereign
and have not had any problems parking, towing, etc. A lot of folks here find that once they use their AS that they wish they had more room. Sometimes having them trade up to a larger size, so consider this. Only you know how much space your needs require.
Good luck, When you decide be sure to post pics. We all love to see your new baby.