I was looking at that same setup for my 5055. My primary purpose was moving round bales, with pallet moving being the secondary purpose. I decided instead to go with this hay spear:
Titan Spear
I realize that you are not needing to move bales, but I know folks that use their double spear (i.e. don't use the third spear that comes with the unit I linked) for pallet moving. I know these spears are not as robust as forks, but I think for occasional use, they are plenty heavy enough. That said, the spear I linked would put the two bottom spears at a 36" OC spacing. I did not check to see if that will work on the pallets that I have. I know the unit that you linked would be more adjustable and would be the better pallet mover, I would think your specific needs would determine if it was worth the extra $200.
I got my spear assembled a few days ago, but I neglected to take a pic. I'll try to take a few pics tonight.