I've read all the posts with great interest. Aside from some of the sass that comes with online forums, if you skip over those parts, their are some brands and models that have had frame/tire/roof/slide/etc issues during certain production runs.
Some of those problems are deal killers, some affect the offering price, some are a good heads up to what work has to be done if we purchase one of those.
It's unfortunate that some feel insulted or insulting when discussing such things. I often think it is due to the lack of body language and voice cues in online forums...and the too oft-prevalent "one-upped-ness" of so many forums condition certain (poor) behavior.
Anyways, thanks to all for the discussions and information. I think it was a fair question and fair answers, even if it wasn't always presented in the softest words ;)