Looking to buy either Exmark Z Liquid 72" 27hp Kaw or Dixie Chopper XXW2500 72" 25hp Kol. Will there be any appreciable difference in power (or lack thereof) between the two? Going to be cutting off approx. 2-3 inches of (dry) KY31 Fescue weekly. 7 smooth rolling acres with few obstructions, no real heavy stuff. Looking for high quality with reasonably fast times. Someone told me that (due to 72" decks) both machines would be marginal at best in reference to power. I assume that ground speed could be reduced to compensate for any power inadequacy, but there is a point where speed reduction will offset the 72" deck size advantage.