No one has commented on Coachman quality or issues. We have never owned one. Did look at one when searching for our first Class C. The Jayco seemed to have a little higher quality appointments and more features that were included as standard so we got it. It may also depend on the model of Coachman, we only looked at one.
I would also make sure that carrying capacity is sufficient. I believe the Chevy chassis of that year were on the 3500 series chassis and it was almost overloaded before you packed any gear aboard. The Ford was on the 450 series chassis and had more carrying capacity and towing capacity.
I prefer a fiberglass roof so our 2nd (current) MH is a Winnebago with the fiberglass roof. There are other brands that also have the fiberglass roof.
The rubber roof never leaked....I was just concerned on how long it would last before it needed to be replaced. We always inspected every six months to insure there were no problems.
Just some things to think about.....