I dont know anything about the others on your list, but I have had a JD 4120 for (4) years and it has been bulletproof. No breakdowns of any kind, and I have only needed to return to the dealer for oil filters for scheduled 100 hr changes. More than enough power for any task I have done. Main job is running a 6 ft bush-hog which it handles easily in any field conditions. 400X loader works great also. If you get one, get loaded rear
R1 tires, telescoping lower links, and the heavy duty loader bucket.