I'm looking to buy my first zero turn for 2.5 acres which is all flat. The Gravely Pro Turn Z (commercial model - 10 gauge fabricated deck) will be 20% off beginning next week and will be $500 out the door cheaper than the John Deere 540R (residential model - 9 gauge stamped deck). The Gravely has the 26.5 hp Gravely engine and the John Deere has the 24 hp Kawasaki engine. Both are offering 4 year warranties but the Gravely seems to be built a little tougher. Anyone have any experience with either?