I dont much about some of the stuff you mentioned, but have you thought OME Dakar Springs? Full leaf packs and they will be able to handle more payload alot better then the deaver springs.
I surely do. If you don't go wheeling and want extra poyload capacity, go with Dakars. If you want a happy medium between flex/ride, and payload capacity go with Deaver 12's (I recommend the Timbrens, I have them and they are awesome). If you want the best ride and flew, but don't care about payload, go with Deaver 10's.Oh, TacoSalad has the Deaver12 springs and he loaded his truck and off-roads as well. He had a good review of his setup in another thread.