Don't see how you could go wrong with either or stepping up to the 3030. Just waiting for the fog to lift, rain to subside, and Lodge work to slow down so I can go test all three side by side. I do like the 3PH position control(agree it should be standard on all models).
Timber, my needs are similar to yours and you sound very pleased with the 7800. Not sure of your stall configuration, but don't see how I can tractor mine as they are laid out now.
Daro