I would have nothing but r1's for what I do. I think turf tires with chains would be the best of both worlds if you are going to mow a lot you can just take off the chains. If you are going to be engaging the ground a lot like with a BB, you want all the traction you can get.Box blade sounds like the tool I need.
So should I make the switch to R4s before taking delivery if I can? It sounds like that may be the case.