IIRC, the ABS roofs are on 1996-2004 Coleman/Fleetwoods, but not all models in those years. Fortunately the ABS roofs are easy to spot and IMO avoid!
Another thing I like about the older Colemans (and Starcrafts) is that you seemed to get more camper, with less features (and less weight) than later models. For example Coleman in the 80's was still selling the Williamsburg 11 ft. box @ 1480lbs dry, able to be towed with a 1-7/8" ball. The comparable current model the 12 ft box Westlake is 2155 lbs dry and requires a 2" ball. The 2010 Westlake also has a 180lb hitch weight compared to 120lbs for the 1988 Williamsburg.
Now there is no doubt that the 2010 Westlake is very nice, comfortable camper that will probably give many years of trouble-free service. But if you want an easy to tow, easy to set-up camper with not a lot of frills, it is hard to go wrong with a well maintained older camper, expecially if you are a little bit "handy"