Gone thru 2 sets of Zeons, and not ventured off-road yet, but i like how they look and they handle well. You are right, they do get loud, but as I tell my wife, it's like a woman wearing high heels, it hurts but you wear them because it looks nice.
I do think DT is trying to screw me, but, I will tell them that I will have a set of tires dropped shipped and they loose the sale. DT direct has them for sale.
Hope you send us more pics of your "RR4"