All 3 tractor brands you're considering are certainly decent machines. It depends on how they "feel" ergonomically to you when you operate them. Obviously, I chose the Mahindra for my 10 acres. Got a few more hp, more tractor weight for FEL work and pulling, no DEF or regen issues to contend with, and the bucket is a larger capacity (cube) than the others I was looking at.
I mow all 10 acres, and use a PTO 84" finish mower. (wish I'd gotten the 96") No issues on lifting it, running it, or pulling it.
I also have a シ mile gravel road to maintain, plus a 400' gravel driveway. One suggestion I might have for you is to consider using a York rake (landscape rake) to maintain that, rather than the box blade, unless you constantly have to cut it and reshape it. The York rake does a great job for me. I've used my neighbor's box blade, and it did OK on the road, but the York rake is much better.
It seems like you'll be doing a lot of grapple work. If you plan on clearing significant portions of your forested areas, you might consider foregoing the backhoe on the tractor, and renting a much bigger backhoe to take down trees, and pull stumps. I find the CUT backhoe's are not intended or engineered for digging/pulling large mature tree stumps. You can probably rent a big-guy backhoe for a few hundred bucks a week. Certainly less than the $1000's you'll spend on a CUT backhoe, not to mention the hassle of changing it out every couple of weeks to mow/brush hog. And you'll get much more production out of the bigger machine. I have a friend who has a big-guy back hoe, and we took down a 100' pine, 60' oak in about 20 minutes. (clean up was a bit longer :laughing
Ditto on those recommending an HST, especially for all of your grapple work. You also might want to consider a tooth bucket attachment, to dig out smaller brush/stumps.
I've got 1300 hours on a 4 year old 2538 (now 2638). Other than an update to the ECU, no problems at all. Change my own fluids and filters. Still purrs like a kitten and works like a Mule.
Just my 2「.