I'm currently trying to chose between a Dixie Chopper (20hp Kohler), Scag Turf Tiger (23hp Kohler) and a comparable Exmark (18hp Kohler). All will be equiped with a 52" deck. I have demoed the Dixie and the power seemed fine. Is there a noticeable difference with more or less horsepower? I'll be cutting anything from lawns to light brush. Any other advice is welcome in helping me make the best choice. Thanks!