I am not going to debate the merits of clamp on vs other types of forks.
But I notice alot of people dont think your tractor will lift 1200# with clamp on's.
Im in the other camp here. I'd be truly surprised if it didnt lift it.
My old tractor had a loader rated for about half of what yours is. I had no issues putting 1100# of concrete on a pallet into the bed of my truck (~3.5' height).
As already mentioned, you loose lift capacity pretty rapidly as you raise the loader. The 2000# spec at the pin....thats to max height. The loader is MUCH stronger than that down closer to the ground.