Well, if the need to upgrade is just for A/C and Cab, I’d strongly recommend the Grand L3560/L4060 over all other options. You really can’t beat the comfort, quality or function of the Grand L series tractor.I dont really need to stack, it's just that 8 bales (a years supply for my mini Donkeys) would take up lots of room. But 8 would require a Bigger Barn and trailer to buy so I think it would be wiser to just buy 4 bales at a time! If my L2501 had a cab and AC I wouldn't really need to upgrade. I buy two bales at a time now and just leave them in my single axle box trailer, It's over loaded but only go a flat mile.
Mike