No experience with these machines - most commercial users go with Scag, Exmark, Hustler, Ferris, John Deere, then is Dixie Chopper, BadBoy, Simplicity, Toro, Huskquvarna and so on.
If I were spending the $4-8K for a new ZTR I would look in your area what most of the commercial guys use - you cant go wrong usually with the bigger name brands - the concern would be for resale value of the lesser known brands.
Also does NH make these or are they made for NH buy another co?
Carl