The 235/85/16 is an e load tire or 10 ply or something which is a really heavy duty tire... I don't know what kind of boat you haul or what you put in your bed but that seems a little excessive...
But if your sticking with it, BFG makes some good tires, I think its the Commercial T/A we have it on our f250 and they are pretty decent. almost no wear on them...
Or you could go to a set of 245/75/16's in either a C or D load rating and they will be lighter weight and still be able to handle anything you can stuff in the back, not to mention that is a common size and there would be alot of available tire designs.