There is quite a large range, wide narrow, hi lift, euro pallets normal pallets etc.
I would contact one of the handling companies and discuss your needs
Are all your pallets the same as each other?
What type of flooring are you having to negotiate?
Do you wish to load a car or van from a pallet?
Do you need to put pallets onto racking?
What would be the max weight you need to move?
Hope that helps..