We got excellent service from a 2000 Holiday Rambler Endeavor DP for 12 years with only routine maintenance (excluding the generator). This was a freightliner chassis, 3126 cat diesel with allison trans. Monaco used the freightliner chassis through some part of year 2000, then switched to their own chassis (8 air bag).
Some of the Monaco units in the time frame you are looking at used a 4 air bag chassis with trailing arm problems and reported harsh ride. Google motorhomes using Monaco RR4R or R4R chassis for a list. If you do buy a unit on the RR4R Monaco chassis, be sure the trailing arms have been replaced as it is a safety issue.
We sold our HR in 2016, and are beginning to look again in the same year range as you state. I like the monaco products on the 8 air bag chassis. The floor plans of some Winnebago units have a nice TV placement that is NOT over the drivers' head. (Learn about roof caulking on the winnebago fiberglass roof before buying the winnebago). Country Coach is also on our desired list. Newmar makes a very nice motorhome also.
Good luck with your search.
Fred
