if you like dripping, you will love a Reo! (reosmods.com) There are lots of good dripping atomizers to choose from,and each one performs a little differently. So HOW you use the one you choose to use is more important than which one you choose to use.
The io6, HH-357, and Cisco spec 510 are all good atties, but they are not my favorite. My go-to atty (now don't laugh) is the Joye LR 510-T with the wick plate removed, but this is where the "how you use" comes into play. The 510-T only has one air hole in the side of the connector instead of the normal two. So it needs to be mounted on an unsealed shorty extension so that air can get to the center hole.