The Hastur RDA is pretty nice. I bought the V1 when it was released months ago and the flavor is pretty darn good. Plus it's top airflow so no leaking. I don't know if you drip, but if you do or have been considering it you could do a lot worse for $30 shipped. They only have the V2 available now but it's probably better because it uses a Velocity deck unlike the V1.
ETA: I realize that's really neither here nor there since you're talking about the RTA but just wanted to mention it.