On heavy vans here is what I have used and what I thought of them.
Swamper truxus 37 ran good and quiet on road great in snow but wore out super fast needed a lot of weight to keep balanced
toyo mud terrain 37 good all around tire wears fast probably as fast as the truxus which was way to fast, balance pretty good
toyo at 35 wears much better than the toyo and super swamper great all around on road tire not much experience off road balance good
hankook dynapros mts 33 and 37s wear like iron, rock in the snow and mud and about the same amount of sound on road as the swampers and toyos and they are cheaper tire is very true and balances out very easily and stays balanced with no problem.
I ran some bfg muds on a diesel truck and had problems with broken belts and balancing and they wore pretty quick. Used them for years on my jeep and fought with afew broken belts on those tires to but they took a beating all the time.
I put a set of hankook dynapro at's on a van I built then drove it 200 miles I liked them they handled and rode good and were quiet.
My tire shop I buy a lot of tires from really has had great feed back from the duratracks so I may try a set of those out down the road.
I keep going back to the dynapro mt I like it for me. Not many people really need a mt but for where I live and the fact that my van is used mostly for off road trail trips and exploring I need the mt's. I never try to sell people on mud tires because if you figure out how much off road use your van is going to see it usually is just a waist of money. Hope that helps I have done gobs and gobs of research on tires and it always comes down to vehicle weight and how you plan to use it. Good luck with your choice.
Derek
How many miles have you got out of the Dynapro mts?