Do your research,research,research.
I got ProVari V1 about 1.5 years ago. No regrets at all. Gives me what I need and ProVape has been a first rate outfit.
*EDIT : As I said research... I'm adding this today because I did some further research of my own and there are many interesting, newish VV options (size, form factor, price) currently available. Not trying to dissuade you from a ProVari, mine has been great, if that's what meets your needs.