I was thinking of trading my ZD21 in for the new ZD321. After talking to three local dealers, I was advised to NOT purchase a 21 h.p. model - not enough horsepower for the deeper decks and much larger transmissions. Matter of fact, these dealers were advised NOT to sell their remaining stock (per Kubota) on these units until a resolve was determined. So, with that being said, any input from ORANGE blooded Lawnsite members? The ZD326 is $1000.00 more than the ZD321, so I need to save-up I guess.