Can you tell why the zero turn mowers you tried were "not for you?"
I ask because...
I mow a few days a week now (not nearly as much experience mowing as some other folks here on the forum have--some have done it professionally for many years I'm new)...I mow everything from three acre rural yards to small residential lots. The three acre yard is the biggest one I have so far, but I would not mind taking on a larger lot.
My deck is only 52" but I mow two acres in 40 minutes, including unloading and loading (not counting trimming). Three acres in under an hour (not as many obstacles in the three-acre lot.) It would be faster with a wider deck. If I take on a lot of bigger properties, I would want a 60"
I use an Exmark and I love it so much, it makes me want to dance in little circles.
I almost bought a scag, but did not like it (though they are wonderful mowers). I didn't like the Kubota zero turns at all.
The other contender would be a John Deere but I couldn't afford those.
I will second the idea that if what you really want to do is mow, a zero turn is your fastest, most economical way to do that, and you won't tear up your yard as much when it's wet. Yes, it'll be heavy, but not as heavy as a tractor.
It will also mow a lot faster than your tractor, and when you have acreage, time spent on the mower once a week (or twice, depending on weather and where you live)becomes an issue. It will also leave you with a LOT less trimming than will a tractor-mounted mower. You can get up against stuff with ease.
So if you didn't like the mowers you looked at, it's worth looking at others. Many brands out there, and they have subtle differences that make a big difference in the mowing experience.
A seat upgrade to an air-cushion seat will save you some hate on a rough property.