I am thrilled with the new Cub Cadet ProZ commercial 100 series we got. First of all it uses a steering wheel instead of dual bars. That means you don't have two hands committed all the time. Direction and speed is determined by foot control. Mine has the fuel injection, so no choking to start. Being commercial, it has super fast blade speed which gives a superior cut and look to the lawn. Most zero turns have serious issues on any kind of horizontal cut on a hill. The steering wheel model will NOT wash out on hills. MUCH safer and Cub claims it will speed up your cutting time significantly. Very comfortable seat with armrests and seatbelt.
CubCadet - PRO Z 160S EFI
I'd do some research on their lesser models, as some had reliability issues. Be very wary of any of the zero turns from the big home improvement guys. The models they offer may have major manufacturer names in green, yellow, and orange, but are built for them to meet a low price point and are not the same as what you'll find at lawn equipment dealers.
My advice is look long term. What is it realistically going to cost you to mow x amount of grass for a period of years. Do you want a mower that you pay to have hauled off after 10 years or less, or do you want something that still has value and life left? Spending more now should save you on expenses for repairs and stress in the future.
You will need service on anything you buy eventually. This is where a relationship with your local dealer will be especially meaningful. They would much rather service a unit they sold than one from the Home Improvement stores. Most importantly that means in and out quicker, and perhaps less expensive than servicing a unit they didn't sell.
Because of those considerations, for me, my highest priority was choosing a dealer I felt comfortable doing business with that was close enough to be convenient. Then I chose from what mfg they carried. I was lucky to have several dealers that carried Cub Cadet.
Now I have a mower that should last over 10 years with minimal maintenance that is comfortable and doesn't hurt my back. (hard to express what that's worth). It makes the lawn (fields) look great, and it will even tow a cart. They also come with steering bars if that's your preference, but drive the steering wheel model before you make up your mind.
Good Luck!