I have a 2000 Holiday Rambler Endeavor 36' with about the same mileage. Mine has the aluminum roof. I have had mine about 3 years with no major problems. Did add new tires after I got it. Doesn’t have the larger V-10 but seems to do ok. I have not driven the newer ones so I don’t know how to compare the ride.
I have made 4 trips to Bristol TN and back pulling a small cargo trailer and have been pleased with the unit. I average about 6.5 to 7.5 mpg based on 63 to 75 mph.
I think they are built well. Hope this helps.
Michael