I would highly recommend the Honda Commercial Series HRC216HXA.
It's the latest model of the one that I have been using for over 25 years, except mine has the magnesium deck. Never had any issues in over 25 years. Just regular oil changes, cleaning, sharpening blades and cleaning/replacing air filters one time. Starts first pull even after sitting all winter.
These are the mowers most all commercial lawn mowing companies use in the midwest.