Regardless of whether I choose the B2601 or the LX2610, I plan on getting turf tires. What do you all think about loading the rear tires? Obviously for loader work it would be the correct choice, but if I am using the tractor for mowing primarily and loader work secondary, would I be ok not loading the tires and just using rear ballast on the 3 point when I’m using the loader? My concerns with loading the tires are the additional weight and compaction/damage to the soil. On the other hand, my concerns with not loading the tires are stability and safety. What have your experiences been?
I have a B2601. I have turf tires. I haven't loaded them. I use the loader and have never had an issue (I have a ballast box).
To my mind a ballast box is better for loader work than loaded tires, as the weight is all behind the rear axle - it lifts weight off the front axle in a way that loaded tires don't. If you have the turning space then an implement is also fine ballast (a ballast box lets you get into smaller spaces). That rotary cutter would be excellent ballast.
I don't like the idea of loaded tires on the lawn. I also take the loader off when I mow, and it makes a big difference to how the front of the tractor feels - a lot less weight over the front axle. I would expect loaded tires to compact the lawn significantly more.
I have no current issues with stability. I have a roadside that I mow with a couple of steep banks that must be mowed along the side of the bank. They feel super uncomfortable to me (read - it took me a few goes to build up the courage to drive along it). I stop at the steepest part and rock the tractor every time, because it feels so uncomfortable to me and I worry it'll go over. The tractor never shows the slightest sign of tipping. So, in short, my testicular fortitude is far more of a limiting factor than the tractor's capability. I guess that could be different for every person, and it depends on what it is you want to do. But so long as you take things slowly when you have a load on, or on a very steep sideways slope, I don't think loaded tires are needed.
My other main observation is that you can always load tires later if it turns out that there's something you want to do that you can't do. It's inexpensive. It's harder to unload them if you do load them then change your mind. And if you do load them, you'll never know if you might have been fine without loading them.
To me the big downsides of loaded tires are ability to change and repair tires, and not being able to remove the weight when you don't want it. For a landscape tractor I think the latter is quite important. Having said that, people have been loading tractor tires for decades (or more), so it's not like doing so would be a bad choice. I just don't think it's needed for anything I personally do with my tractor.