I have this Johnson mounted on a NF 126. It will do good for what you are wanting to do plus more , but you have to have alot of weight mounted on the back. The wheelweights on mine are 100 lbs apiece plus my 200 lbs and i have added more weight on the back.
This tractor is a dedicated loader tractor because they can be a pain to remove and store , but i guess you could take it off and add your other attachments.
And they usually bring alot of money , especially for collectors.
It's a tough call. If you just use it once in awhile , i would try to get a dedicated loader tractor. If you think you may need to use it more often and maybe do heavier work , i would get something bigger.