At the upper end of moderately priced is Grand Design. Their after-the-sale service is historically excellent and generally free of the "talk to the dealer" run-around that many major brands provide. With Thor buying up most of the industry (including Jayco) your options are getting more and more limited every day.
Whatever you choose - learn to look for the things that indicate quality but don't sell RVs - like what type of tires they install, do the RVs come with wet bolt kits on the suspension. The manufacturers who skip on these things skip on other stuff.
Expect problems. These are rolling houses built by humans. You can't buy your way into the perfect RV, but you can check on the reputation of the manufacturer and see how they (typically) respond to problems. I'd recommend looking at BBB complaints for any considered brand to see how they respond to consumers.