personally i'm not a fan of the big joes...way to heavy. have you looked at the losi zombie maxx tires? they are standard size and hook up in just about any terrain. i have well over 4 gallon on my set and they have plenty of life left.
the HPI Gt tires look like they wouldnt let you down.
i run a variety of tires.
i've got a set of 40 series crime fighters, MT crime fighters, MT losi zombies, 40 series moab xls and a set of HUGE losi tires, not sure on the name of them.