I'm expecting epowers to come some time this week, I use cartos exclusively (except now I'm dripping cause batts r on their last legs!). I've really only used xl stainless dcc's at 1.5 ohm's. I've tried regular cartos, but not impressed, it could just be that they are sub-par. I've been reading so much about different carto options and I'm just not familiar. Fluxamizers (sp) look interesting but it sounds like there is a real learning curve. Not sure yet what a sapphire is yet. I'm really wanting to find the right carto/ohms for the epowers. One is 45650 and the other is 85650. I know that it seems that the jury is still out on whether or not the LR dcc's will kill the batteries. Please give me your suggestions!