Look into the Orchid RBA... I own all the kayfuns created, along with the lite versions, as well as the Russian, along with the Aqua...
Look into getting your hands on an Orchid RBA
Also, in a perfect world you'd eventually acquire both an Orchid and a Kayfun, because the Kayfun is still an amazing device, I use twisted 30g kanthal (twist with a power drill) and 10 rotations around a drill bit. For the people who have kayfuns, they know what im talking about.
Kayfuns & and the Orchid are slightly harder builds, but nothing mind-bending. The major advantage to a RBA over an RDA is strictly convenience... some say flavor is better, but that is arguable (on both sides). Example:
Epic Juice's Apple Jax in 6mg is my daily vape with a dripping atomizer, a Stillarev2 is my daily dripper.
Move that Apple Jax to a Kayfun, and (imho) it taste worse.
Take Alice in Vapeland's Zombie Apocalpyse, put that in an RDA, tastes okay.
Toss it in a Kayfun and it's completely different!
This all comes down to juice consistency I believe, as the poster above stated on page #1, the RBA's are dependent on pressure and wicking, so thicker juices don't do as well through a tank atomizer, where thinner juices shine. Depending on what your favorite juices are, the kayfun/orchid may turn out to be an epic fail for you, and not worth the money.
Personally I prefer a dripper, but while driving in Southern California traffic, or at work, nothing beats the convenience of having a tank. Sometimes I really do get irritated at how much juice I burn with my drippers, and then I'll go on a tank rampage for a month or so. It's all a vicious cycle, that's why I believe you should experiment with all types of devices. There's a device, and juice for every situation. Try not to over think this. I can rebuild a dripping atomizer in under 5 minutes, dual coil, around (my preferred .4ohm range).
The Kayfun will take me at least 10 minutes to clean it, wrap the micro coil, and get the cotton wick in there. Oh yea, and make sure you ONLY use cotton wicks for tank devices like the Kayfun/Orchid, cotton is the clear choice. Drippers on the other hand, I still prefer the taste of silica wicks over cotton.
As far as genesis tank atomizers go, personally I think the taste they produce is their downfall. But my favorite genny tank is my Kraken. Run it dual with SS braided wicks with ekowool sleeves.
Hope this helps, just sharing some of my opinions after buying all these damn things.