Cobra clone also has some good reviews and free shipping from the site. There are some cheaper versions of Cobra with plastic drip tips you can also check.
$11.86 Cobra Electronic Cigarette Round Mouth Atomizer at FastTech - Worldwide Free Shipping
The only problem I have with suggesting a Chobra to a new RBA user is that they can be a bit frustrating to set up as your first one, due to the fact that the wick hole not being insulated. This can, and has for many new people, cause major frustration: "wrap, wrap, wrap, POP. "wrap, wrap, wrap POP.......?! what is with this crazy thing?! <....I've seen this scene play out more than once
Another draw back of the Chobra is one of bad top cap design in that it uses a threaded top cap, rather than a friction top. We all know that QC standards are not all that wonderful in some of the Far East shop. It's luck of the draw if your air hole will like up with you wick. Of course, there are ways around this (drill a new hole, use a couple of o-rings over the threads to create a ghetto friction cap), but some new people would just say screw it at that point
This is not to say that I dont have a few Chobras in my collection, but out of all my genni style RBA, those gather the most dust. Just not my favorite.
Someone else mentioned the Igo-L...awesome RDA, for beginners and pros alike. Dollar for dollar, probably the best budget RDA out there right out of the box. I like to drill my air hole on those out to 1/16. They can really rock if set up with a nice coil. Great suggestion.