dont forget about the epower being upgrade-able...variable volt switch in the works, and all the parts are replaceable, so you dont have to buy a whole kit to replace just one thing. if you have time to tinker, i would go the box mod route, but if you are like me and dont have time and want the adaptability, try the epower. i have been extremely please with the battery life and it looks pretty good, esp without the cone lol