I am debating on buying a new tractor for snow removal. I do half commercial accounts and half residential accounts with decent sized parking lots. I'm trying to decide if I should get a John Deere 4066R with hydrostat, or step up and get a John Deere 5075e or 5075m? Which would you recommend? Currently I run a 1025R and do the small lots and walks with it, and sub my bigger lots about, but I think the time is come where I need to start doing the bigger lots myself.