When I went to buy my retirement "bucket list" tractor, mostly for utility jobs and tree clearing, I "downsized" to an L5740HSTC instead of the larger M I had my eyes on, only because I didn't want to have to buy a new diesel truck to haul that much weight, as I need to move the tractor once in a while. I'm having second thoughts already at 20 hours. I'm having wheel weights put on the tractor right now, and I hope that helps, but boy is the rear end light on my tractor, even with a full
ballast box. I also bought too big a grapple, with a solid bucket, which made my weight problems worse, so I'd suggest an open grapple plus a standard bucket. I don't regret my decision, love the Grand L design and ease of use, but have to turn the autothrottle off when using the grapple to get enough power to pick up heavy loads. As mentioned before, minimum of 1800-2000 rpm and things do get a little jumpy then.
One of the issues I faced was that I have to cross some lawns and other "tread lightly" areas, so while weight is marvelous for most tractor applications, sometimes it creates other issues, including transport. If you aren't moving your tractor off that property, and are going to be staying in the fields or roads, boy I'd get as much weight as you can afford. One last consideration is that a larger tractor can be more cumbersome in the woods, unless you are knocking everything down, so for close quarters driving, something a little more compact lets you get into places without ripping off mirrors and scratching up the machine.