I run DynaPro's on my WJ and will be putting a set on our Explorer next year. You can EASILY run these tires for 60k mi with proper maintenance, we have 50k mi on our first set and they seem to have almost 50% tread left.
Even if you never drive off-road these tires are a good choice. I believe A/T's in general increase the safety of a vehicle. I noticed an immediate improvement in handling after putting on these tires, the JEEP felt more stable in turns as a result of minimal sidewall flex. Increased sidewall strength is a huge plus and also helps when she occasionally smacks the curb when parallel parking. We do spend a decent amount of time on trails and in the mountains, these tires work great in mud, snow and loose terrain situations and are not noisy on the road at all. And best of all they are VERY cheap in terms of price !