The only problem I see is feeding the ADFs. In a tank that big and planted, you may have some trouble feeding them, since usually you have to put the food really close to them. The Cherry Barbs shouldn't be too voracious with eating to get in the way, so they should make good tankmates. You should be able to feed the ADFs ok with a turkey baster. I'm not sure how many ADFs you are planning on, but I'd atleast have more than 1.
