So I recently bought a ipower 80w with a cubis pro tank. Awesome , except the cubis is a spitback machine using the 0.25 coils. Using .5 and 1.5 coils not a bad tank. Anyway what I'm looking for is something as a backup slash 2nd option . Would be nice to have a spare to just grab for a diff flavor . I have been looking at the Joyetech models AIO ego box (plus ohming only) , the evic mini basic with cubis mini pro kit, or possibly a cuboid . I don't need a pricy kit as it's mostly just my backup anyway but internal battery is definitely preferred . Anyone have input on some of these ? or maybe better options?