Another consideration is approach angle with location of the shackles/frame wrt the axle centerline.
Some do a combination of the SOA/SUA. SOA on the front axle and SUA on the rear with lifted rear springs and longer shackles. The shock lengths will be different between the 2 axles as well.
There are other changes that need to be looked into before you make a choice. Brake lines, steering, larger lift usually retains SYE for the tcase output, flat belly, stock crossmember, or dropping crossmember.
I suggest not to look into dropping stock crossmember. You lift frame from axles to gain room for larger tires and the articulation/movement of the axles. If you drop the center of the frame lower (dropping the crossmember), this only benefits the street driving. Remember the amount of axle lift the half the difference in tire size change.
