If you're near Murfreesboro, you really need to go to Nashville Vapors in Smyrna. They have a really good staff, with varying degrees of knowledge. They all seem to have a good understanding, but some more than others. If the person you're talking to can't answer a question, they will hook you up with another of the staff who can. They won't lie to you or make something up just to make the sale. Highly recommended. Great selection of juice (they make their own Sancia juice), and a good selection of toys (I held my first ProVari there). They have rebuildable supplies when you get to that point (and you will) and they even have a guy who knows coil building.
I realize I'm gushing about them, and I have no affiliation with them, but they have helped me tremendously on my journey to be analog free.