Very sound advice posted above. That link is a "must see" in my opinion.
I'd like to add this; If you haven't tried 5v or higher yet, you may want to consider getting a 5v passthrough and a 5v, 2A AC to USB adapter to see if 5v is what you'll like. For ~$25 for both, it's a very worthwhile investment.
Personally, I'm quite happy with 3.7v and feel that 5v or higher is too much for me. However, I DO have some low resistance atty's that I use on my eGo for those times that I'm craving a real cig. The low resistance atty's "simulate" the 5v vaping experience.
Now, if I
were in the market to buy a mod, I would most likely go with the Silver Bullet. It just looks beautiful to me and an 18650 battery will last a couple days between charges. Not to mention I have yet to see anyone report problems with theirs. I imagine that big battery coupled with a low resistance atty would be quite the vaping machine.
