Thanks. I've been looking into the innoken iSub tanks, the iSub B looks promising as well as the iSub Apex. If you look in the right place, most of the iSub line can be found for less than $20, the iSub coils are all interchangeable on all of the iSub tanks. My other front runner is the digiflavor espresso (that one might win on name alone, lol) it's a bit older so has a lower price point and some features that I like. I still have some comparison shopping to do, but I think I'm close to a decision. Might get another kit eventually anyway, my husband isn't too happy with his little yocan hive 2.0, even though it doubles as a wax atomizer. Thanks for your advice, I will consider a rebuildable when we replace his.