I am in the market for a new ZTR. I am really impressed by the Scag mowers lately, but the one that I am currently looking at has a water-cooled 27HP Kawi. I have only ran Kohlers and haven't heard much about the water-cooled Kawi. Any comments/warnings are appreciated! Also, this will be my first Scag. Which is better ... Exmark or Scag.