Not sure what size you're running, but I am sold on Metzelers. They wear fast, but stick like glue. I'd rather replace a fast wearing tire than repair damage from a wash-out, not to mention I don't bounce off the road like I used to.
I have run Dunlops on bikes before with no real issues....but never on Big Dog. Sticking with Avon on my Ridgeback.(Avon only manufacturer I have found for rear 330 size tire)
I have the Dunlop elite on my pitbull 250! The bike sat for almost a year and I have since put about 8500 miles on it. No issues and has good tread wear. I am running and avon on the front and dunlop on the rear. Metzlers on the big bear and I will be going back to the avons