one more guy's experience for what it's worth. . .
We own 56 acres and I do pretty much everything from brushhogging to logging to grading to tilling, etc. I upgraded from a
L2550 shuttle to
L4610 HST with a cab...grew up on a farm driving an Allis Chalmers 180 (big) with no brakes and missing half the gears, so anything 'Kubota' is pretty much of a luxury beyond description as far as I'm concerned. Loved the old Allis but she was no lady
My observation is that you want to get the right trractor for your needs and that depends on how much time, money, and land you have among other things, and also whether you have to make a living with it.
bigger is faster but uses more fuel
bigger makes a bigger mess and will get you in trouble faster if you dont know what you're doing
bigger is less tippy lifting things and for loader work in general
bigger is necessary when pulling larger wagons, esp when trying to stop them
some things just cannot be done safely with a very small tractor, including heavier logging, pulling overloaded wagons, baling etc. you need 55-60 hp for baling but you can mow rake and ted with a smaller tractor
smaller is better if you are working inside a barn or in tight spots in the woods, and for finish mowing (e.g. lawn) but other than that for most of what I do now I mostly prefer the 4610 and dont miss the 2550, and I LOVE my cab; all things considered I prefer the HST as an all-around but I dont love the hydro for field work
I think my point here is that within limits, you can get most jobs done safely whether you are under- or over-powered, but in general you will be happier if your tractor is sized right for your tasks and property. Obviously, the best solution is to have several tractors (IF you can afford a divorce).