I've had my Toro Zmaster since 1999. Has worked flawlessly for me. I just replaced the two belts to the deck this year. Mine is a 62" cut. I really only wanted to get a 52" but I got such a good deal on this that I took it. Mine is a commercial mower with a 25hp Kohler and yes it was pricey but I bought it for longevity. 14 years and no problems that I didn't create myself.
There are a lot of good zero turns out there. Buying one in the middle of summer may not get you any discounts. May be able to find a better price in the fall.