My wife quit using an e-cig. I bought her the Joyetech 510 and BOGE 510 cartos. - I've never been a smoker, but I ended up getting bored and now I puff on an e-cig all the time. I ended up buying myself a Joyetech Ego-C Twist and have a MAP 5ml DCT.
I've been vaping for a while now. Probably a year or so. I decided not to buy any more juice this month. Almost out. Don't really care, but I'm sure I'll miss the morning vapes.
I still smoke cigars at least once or twice per week, but I just haven't really wanted to spend the money on the stuff lately. - Ecigs aren't too bad as far as cost goes. I spent maybe $20/mth on juice, and then cartos were about $2.50 a pop. They last anywhere from 2wks to 8wks. Some are fickle for some reason.
Just make sure to buy online. Vape shops will financially ravage your butt hole.
Since you're actually a regular smoker, I wouldn't recommend anything less than an Ego. You just wouldn't be satisfied with the standard 510's.