I think I'm going to pull the trigger on a gravely pro turn 100 series with a 52in deck and 23hp Kohler EFI. I wanted a diesel at first but can't justify spending $11,000 or more on one when I can get as good fuel savings with the Kohler EFI. I can get this mower for around $7500 out the door and can get the Pro turn 52in with 29HP Kohler EFI for $8500. The only difference is 6HP and the 100 series has a ZT3400 transaxle setup and the 200 series has the ZT5400 set up. Which would you go for? and is the Kohler EFI's actually worth it? I know they are better on fuel than a carb set up and have heard really good things about them.