I would also take a hard look at a tracked skid steer for doing what your wanting. Look at decent used machines, and take good care of it then if that way when you think you need a tractor or want a tractor sell the skid steer. If you really want a tractor, like said above you can move a mountain with a shovel, just going to take a while, but not as heavy and easier to move around.
It's pretty much useless to try and shop for a tractor like your wanting by using HP numbers, you really need to look at Physical size, weight, loader capacity and such. Any more you can have many different HP ratings yet have those three things the same. Also are you planning on hauling the equipment around or having it delivered and stay at that location, if hauling is it something you have a truck and trailer That can haul it or have to rent or buy one? It all depends on a Budget, time, ect.
As for the Kubota is junk, That's not so. Have they had some issue yes, has John Deere, Massey, case, ect, ect. YES!!! Been around and used pretty much all of them and most of the time problems with all of them were either abuse, improper use, or lack of MAINTENANCE.