For the 5 tonner I'd be speaking to Red Winches for one of their very impressive spec Twin Motor Trydent winches with the extra long drum.
This winch has a really decent line speed in the high gear, with still a reasonable pull. Dropping down when required to full power.
This change in speed I'm certain can be achieved from the cab by running electrics down the dipper, and you'll get 100m of 12mm rope on this which is a handy amount especially if using a snatch block to double up.
This type of company would almost certainly be able to tweak it further for you, depending on requirements.
You will be able to fit a radio remote like a basic Lodar to this, as power 12v power is easily achieved to a convenient point on the dipper.
It's really just a case of having a mounting with suitable, blade/spades made up to fit your hitch, and have some way of latching the auxiliary circuit.
I know who I would have build the mount, but there are several companies out there who would turn out something tidy and it really depends where you're based.
My advice if you are using such a setup is to ensure the operator remains in the machine to ensure in the event of anything beginning to move the base machine, he can immediately cut off the operation.
If you run the 12v to the Lodar, you will be able to kill either the electrics or unlock the latched hydraulic circuit to stop all operations immediately from the cab irrespective of the external operative who would be using the radio remote.
Obviously the machine operator can do the whole job if he likes by having the Lodar remote in the cab with him.
If you know you're making a pull that's heading towards full power, then fit a hawser back from your winch mount to the undercarriage frame of the machine, and ensure you keep everything inline.
Many people underestimate the power of winches, and they will twist booms and dippers for fun if not used correctly.
You should be able to run one of the numerous plasma ropes on the Trydent and get a great light setup that will save some serious work.
RED Winches Trydent XL
The larger machine brings more options, let me know what machine, hitch and pipework you have on it.
Eddie