i have using an e-cig since december. I started with an ego style and the cheap kanger tanks.
Since that time I have upgraded to a ProVari, Hana Modz V3 and a Russian 91%. The best e-cig is the one that satisfies your cravings for nicotine and keeps you off cigarettes.
As for juice, vapeme.net is a decent shop and are canadian. I order from bombies.com exclusively now.
reddit.com/electronic_cigarette is a great place for info.