42" cut? Just buy a 42" Craftsman tractor unless it is for a commercial application.
How many acres and how often do you plan to mow? Are you buying new or used?
0 turns are for volume cutting 16 hours a day. 60" to 72" swaths.
They use smaller walk behinds for trim or narrow gateways. You need a narrow deck if the yard isn't relatively flat. A wide deck won't cut everything.
I would go with the Husqvarna, Dixie Chopper or LazerZ but atleast a 60" cut.
Anything less wide and it is just bling for the neighbors to gawk at.
I suppose anything is ok for a homeowner. I think Husgvarna makes a tractor with a steering wheel that will turn a 0 radius. Toro and Snapper can't be too bad.
Do not buy a Dixon 0 turn. Replacing cones, chains and bearings is about $600 for parts. They might have changed the design from mechanical transmission to hydraulic.
Avoid buying anything with the Kohler CH22S engine. There is a flaw with some of the crankshafts and the crank gear cracking. Only way to repair is to take chances with a new crankshaft. The replacement engine is a larger engine.