I have had Coopers on several pick-ups and they rode very well. I wasn't towing then, but I wanted quiet and smooth rides and they delivered. My wife had Coopers on her Buick LeSabre and they were excellent also. I now have Michelins on my P-U and love them!
I use Cooper Discoverer H/T Plus. It is a 2601 lb tire. They do great towing, but as with all hard / extra load tires. They give up a little on forward bite. Do have great side bite. Last as long as the Michelems