Yes buy Pallet forks they are a very valuable tool. If you have them you will invent ways to put them to good use. 48" is a good length
For your MX5100 here is an idea what you can expect for lifting capacity
LOADER OPERATIONAL SPECIFICATIONS LA844
(U) Lift Capacity (Bucket pivot pin, max height)
Standard 2443 lbs. (1108 kg)
(V) Lift Capacity (500 mm forward, max height
Standard 1852 lbs. (840 kg)
(X) Lift Capacity (500 mm forward 19.7" , 1500 mm height 59")
Standard 2478 lbs. (1124 kg)
You should be able to lift around a 2000 lb pallet depending on size of pallet out of a semi truck This is a pretty respectable amount, remember you also have to factor in the weight of the forks. To full height you could probably lift a 1200 - 1400 lb pallet.
Some ideas

I also use them like a divot puller to pop small stumps out of the ground after push them over with the bucket