auto transmissions

So I'd like to hear some input on automatics y'all have ran in your Cummins conversions..I'm thinking about swapping over to an auto but unsure of the route I'd like to go..simplicity and cost would be main drivers..but longevity is key too..any transmission a favorite over others?? If so why..47rh?? 47re?? 4r100?? Let's hear it y'all..enlighten me..give me something to ponder about and help me decide what to do..



Thanks