Good work, now, get to looking around here for something that will work for you - truly work for you. Me, I say start off with a 3.7V mod, like a 20-30$ box mod if you don't have a large budget. If money isn't a concern, grab a metal tube mod like a silver bullet. And if size is an issue, grab an eGo.
It REALLY isn't about the battery style, mod or eGo, or Riva, or 510 starter, or whatever. It's ALL about the atomizer/cartomizer you choose (and good
juice, like BWB or AVE
juice as an example). I'm suggesting a mod because of the battery life and solid power, but again, it's all about a good atomizer (like a Cisco specd low resistance 2ohm, for example).
However, what was it about the blu that didn't do it for you? That's the most important point, I think.
FWIW,
ice