The L-4600 with the ballast that is needed to offset any loader work will be all that you need for six foot implements.
It would play with them under most conditions! To go to seven and eight foot then more weight might be needed.
To much weight is just a daily drain on the wallet into the fuel tank!! It takes horsepower to move weight!
You will be spending more time bush hogging then any road work. That takes horsepower not weight!