i've got Goodyear MTR's. got about 15,000 on them right now and will easily get more than that again before they wear out. pulled a powerstroke out of a plowed field after a heavy rain...water still standing on top.
they sing a little bit around 50 mph, but slower or faster i don't notice them. i wouldn't want anything other than mud terrains because of where i've been and how they've saved me and others more than once.
the new one's with kevlar look interesting, but i'm curious about how many miles are expected out of them. for some reason, they just look "softer" than the old MTR's.