That's like asking, What is the best car, and where do I
buy it. You're going to get dozens of different answers.
More information is needed;
How often did you smoke?
What style of e-cig are you looking for?
How cheap or expensive do you want to go?
Any other related information will be nice.
Also, if you update your profile with your Location, you may find people close by who are using the e-cig, and can give you one on one information.