Why doesn't Exmark, Scag, etc use the 28 hp Kubota instead of smaller Kubota diesels. Is it the size of the engine or what. 25 hp doesn't seem like enough to be on a machine like a XS Lazer or Turf Tiger though I'm sure they have decent torque? Looks to me like Grasshopper has the best diesel line up. For some reason the Cat doesn't seem as popular as the Kubota. Any reason that the Cat wouldn't be reliable.