Your dealer is what is most important. I think scag walkbehinds are the best ,i would stay away from them fir a ztr.I own a bobcat ztr and love it. Just read the many post about exmark they seem to have most positive replies about them and you could e-mail the company from this site.Take a look at exmark,bobcat,.
button, and various brands get your best
price , demo them..Remember you get what you pay for,don't let price be you only guide.good luck