As for the Ego,
I have the mega atom, not that fond of it, sounds like your smoking a bong, you need the LR attys for sure. i noticed the battery life does get chopped by about half using the low resistance ones, but for the ego i still can use it ALL DAY without a charge. not to fond of the carts or carto's for the 510.... i get juice im my mouth, lips, just sucks in my experience. i use a drip tip and love it.
I also play black ops on the 360 and run a clan, hit me up! we have a couple of ape users!
GT= Kingbtheone
website= www.SoldiersAfterWar.com