I really want to pick one of these guys to add to my collection. Anyone have some knowledge on which would be better? Personally I like an airy draw because I have RDAs with drilled out holes, they spoiled me: sorry not sorry. So I'm leaning toward a kraken because it has the adjustable air flow controller. I'm not sure what brand these are on those sites, I think the kayfun is a tobeco no idea though. Any knowledge and opinions much appreciated!