Depending on your battery I bought a micro-d from cloud9 last week. Haven't put it down since. Cheap, easy to coil and works fantastic with micro coil and cotton/silica on my standard eGo. Great first time dripper.
I hate the octopus RDA. It has a really unfriendly air-hole (unless they've changed it) - I'm using it at the moment because I'm waiting on new RDA's coming in the post and it's making me sad. Having said that, it's very cheap and good to start building with.