For me a self-leveling bucket is hit or miss.
On the tractors that have had it, it was nice, but only because it worked in conjunction with other features like automatic-down shift and automatic posi-traction. While I was petting my dog on the head, the tractor had already shifted up one gear as soon as I put it in reverse, was rolling the bucket back to level, and lowering the main boom. Once in the bank, a step down on a foot switch kicked the machine automatically by one gear, kicked in the posi-traction and was rolling the bucket back.
That was nice on a spade nose bucket, but on a CUT or SCUT I don't think it would be needed. A length of bar and a notch cut in it would do the same thing for about $5.