Whatever motorhome you purchase - new, or used - it will require repairs and service, It's not a matter of if, but when, and how often.
That being established, pick your dealer first - visit their facility, and check their service department. Check with their customers and get references. Then buy what ever brand and floorplan they have that you really like. This may seem like a lot of trouble - but a motorhome is a big investment.
40+ rigs are nice, but a lot depends on your planned use. If you're going to be a fulltimer, and not put many miles on it, big is a plus. If your'e going for long trips with lots of campground changes - the fuel economy and maneuverability comes into play. I personally prefer rigs in the 36' range - and a toad - for general use. For our "continent touring" jaunts (2 or 3 days in one spot separated by hiundreds of miles of travel) we bought a 24' View.
A word of caution on "short" class A's - a long wheelbase is your friend. We had a Monaco Knight 30J (31' - with a 168" wheelbase) it was ma wonderfully compact, well equipped home. It camped wonderfully - but it drove like a pig on ice. Anything resembling a strong crosswind was an exercise in terror - and being passed by (or passing) a semi was a white knuckle experience.
Neither of our Winnebagos have this problem. I'm a retired race car driver (amateur) and have worked driving semi's - I'm no wimp on the road.