Personally, I kind of like the Cyclones on the DI, and the Boost on the Defender. But only barely. So I let the kids decide and we are keeping the original Boosts. I'll have a stack of four Cyclones for some time, in case anyone is sore about missing out on Peter's deal, but at least (including the four that were on the truck) I got rid of the ELEVEN stupid old tires I had sitting around here! The DI is not going to be driven much more than once or twice a month since both kids are now off to college this week. It will be a future fun trail rig since it's too difficult to replace the special edition body matching bumper ends and chrome.... The thing still runs super smooth and quiet, pulls really well, and the TC even works! Mostly.