I am using a istick 30 with an ego mega sub tank. I am a direct to lung vapor. I was looking at the Smok R80 kit, I think it comes out in Jan. 80 watts temp control with a TFV4 tank.. around $60. Not sure if I need temp control, never used it. But I am open to suggestions. I am ready to upgrade now(spend some Christmas money) The R80 sounds like it does everything I would want. Thanks for the advice.