Well, if you're looking for a squonker, the good ones aren't going to be cheap. But Reos have rave reviews, they have some minis if small is what you're after. You're looking at about $150 for one of those though, and they aren't variable or anything. They have a little wiring, but function more like a mech mod. Alternatively, you could get a regular box mod with a tank. I've been really happy with my Innokine Coolfire IV. It's only slightly larger than the drip box. If the dripbox satifies you, the power of the Coolfire should be more than sufficient. The only downside is the internal battery. Which, I mean, it is what it is. They wear out and you can't replace them. But for what it is, it's a great little portable mod that offers decent power.