I had some Cooper tires back in the late 80's. They were o.k., but not the best tires that I've used. That was for a car though. I'm not sure about their new tires.
My brother had an '00 Explorer 4x4 that came with Firestone. When he took it in for the recall he had Michelin's installed. He's now driving an '03 and it came from the factory with Michelins. I drove it a few times, and I'd say they give it a nice ride quality.
I would not run coppers again. I had them on my 90 IROC I just bough as a comuter. I did not like the enkie wheels that were on it so I bought some 18 inch wheels and bought these cheap nexen tires off ebay. they out perferom the coopers front to back and were probably cheaper.
short story long I think you can do better for you money.
my dad has a set of those on his dodge 4x4... they are some sort of all terrain tires... they seem allright... i dont know much about offroad tires tho