I am thinking of getting a lawn roller but I'm not sure which one would be best. I have a John Deere X300 tractor and will be using it on sod and also to compact some loose stone I'm putting in the driveway. Is there any disadvantage to a poly one over steel? Or vice versus? Would stones damage the poly roller? All the small ones, 36", seem to be 400 pounds. The 48" ones anywhere from around 600 to 800 pounds. Do you find the 400 pound ones to be sufficient? Thanks in advance.