Thinking of buying a class A in the 60 - 80K range, diesel, either DP or FRED. This would be primarily for a trip around the U.S. maybe 15000 miles. Is there a posted thread regarding the most dependable brands and things to avoid? Looks like I can get a low mileage '06 - '08 when I look at RVT.com. Looking for a smooth trip without hiccups. Am I dreaming?