I am looking to buy the Scag Tiger Cub- 48" advantage deck. I can purchase it with the 19 HP Kawasaki or for $100 more, I can get the 20 HP Kohler. I keep hearing differring opinions on which is a better engine. Can anyone tell me from personal experience? Also, is this enough horsepower for cutting 4 acres a week and possible mulching at times here in Louisiana where it can be wetter and maybe thicker due to our weather patterns? By the way, this is strictly for resdiential purposes and not commercial so I want something that is going to last and also give me a good cut.