I'm using the X6 mod with the kanger pro tank II. Works fairly well so far although I'm dry burning or rebuilding coils every three or four days. I'm new to all this as well so not positive that I'm not doing something wrong.
The X6 has plenty of battery life to last all day on one charge. It also feels more comfortable for some one like me with larger hands, the ego my wife uses is way too skinny.
Happy vaping and good luck