So I picked up some panasonic 18650 batteries, as I had ordered a stainless steel lavatube, I canceled that order as I decided to wait for the new lavatube and vmax to hit, and see what's best. In the meantime, since I've got these batteries, I was wondering about the epower series? i know there's different versions of the device, and I wasn't quite sure which one to get, smoktech or joye (white buttons blue buttons?) and who sells the good version as a barebones device not as part of a kit? Any help would be greatly appreciated!