I dont know what you already have but i love my goon rda, i always recommend it to anyone that ask me what RDA they should get. It may take 2-3 builds to get use to building on the clamp style post, compared to the traditional 2-4 post style rda, but once you get the hang of it, i think you will love it. you can basically build ANYTHING on the 24mm goon rda.
i have a kenndy 3 and 2 post, wismec theroem, sub zero atty, dodge, mutations, dotmods, a bunch of velocity style rda, but i love the goon and its always the first one i grab above all else.