To my knowledge, there are no neos that are "preferred" by the frogs. It's all pretty much a matter of your taste.

A slight correction the what Lynn wrote. Most broms are epiphytes and live high in the tree canopy where they can get the sunlight they need, so using them in an enclosure for terrestrial frogs can seem a bit silly. But they are easy to grow and can be very dramatic with the right color mix and placement.

Choose a few that you like and go for it. The frogs will love them. Even my white's enjoy the brom i threw in their tank