Watched a demo of the big Kohlers last year at Expo and I'm seeing adds in every magazine but haven't seen them on a ZTR yet. Who is lined up to use these engines (Exmark, Scag, Cub Cadet)? Just wondering out loud. I've never had a problem with a Kohler but when they rushed the 30 out with all the carb problems it made me wonder about if they are really taking their time and doing their home work. Briggs all ready has a good track record in the 30+ hp application. What about the big Kawasaki's I'm hearing about? Will they come in horizontal and vertical? Who will be using them? I'm very happy with my 31 hp Briggs (Dihatsu) so far. It seems like a beast compared to my 27 Kohler (seem like a lot more than 4 hp difference in the field). Lots of torque and the gas usage isn't bad considering what it will do to a thick lawn in short order. I have put off on Hustler in the past because of bad experience with the XR7 deck in Northern grasses (weeds) but it they put a 38 hp engine on it it would be a real force to be reckoned with in areas with Southern grasses.