Class A's have always had only a few manufacturers in the middle market with any real quality IMO. Tiffin and Newmar where always our favorites.
On the tow-able side we went to Tampa this last week and looked at KZ and Momentum's from Grand Design and left impressed.
If you expect a problem free experience you shouldn't buy anything. Much less a rectangle that travels down the road at 60+ mph. While I agree quality could always be better there are still some manufactures doing better than most.
We've never really been all that impressed with Airstream. For the money you can replace a grand design or KZ two or three times over the 30 years.