All that I own right now is a Ameravape Manhattan, and am looking to get a box mod. I want the most advanced device, which I've decided is most likely a dna 40 device, assuming I get one with a functional chip, with no issues. My dilemma is deciding which dna 40 device to get. It seems the hana modz and Vapor Flask are of a higher quality than the Vapor Shark. Any ideas on how to determine the dominant device?