I have a 3038e and it is a lot stronger than I thought. I do have the rear tires filled but have only had problems pulling a 6 foot box blade up a steep hill full of gravel... But my previous 68 hp JD struggled with that too. However, I am unfamiliar with the equipment you list so defer judgement on that. I will say, as to brand, that Kubota, John Deere and other make good tractors... All of them. There are differences in design, comfort and other factors. Decide on the power and weight tractor you want, then check out your local dealers. You'll want a good, friendly dealer for your first tractor. The choice of brand may be secondary. Pick a couple of tractors at a couple dealers and then actually drive them for more than two seconds. Note controls, fit, engineering and such to make sure you are comfortable with that unit... And with the dealer. Then start negotiating prices. Most dealers have some leeway if you are buying equipment with it, etc. If you already have the equipment, dealers here will frequently let you take the tractor home and try it on your chores, with the option to bring it back if it doesn't work.
Again, you will find partisans on TBN for all different makes of tractor, but most major brands are quite good. Use your own judgement, and get that good dealer.