I can't decide which Exmark to get.... I Know I want the advantage series for the ultra cut deck just can't decide which engine. My two choices are a 2006 demo model with 25hp Kohler with 80 hours on it, price on it is 6100. My other one is a 2007 Demo with the Kawasaki 28hp for 7400, Can't decide which one. I hav heard that their were some problems with the Kohler 25hp, but not to sure.