I am in the market for another ZTR this spring. I currently use exmark lazers with 27 hp kohler. By far the biggest problem we have in the summer is having to double cut many lawns due to excess clippings clumping all over the lawn. Do the higher hp mowers help this, possibly the 31 or 35 HP machines? Any other suggestions on how to avoid all the excess clippings / clumping?