I've been smoking ecigs for about 4 years now, and have tried many different types and brands.
If you want a cig sized one, go with either the Smokeless Image Volt, or the Joyetech eRoll. If you want one bigger than a cig, get any of the million versions of 'eGo' style ones out there. If you want the best and most expensive, get a Provari.
The 'container' for the liquid is either a cartomizer, atomizer/cartridge combo, clearomizer, or tank. There are many different tanks and clearomizers on the market.
I recommend finding a reputable local store that ONLY sells ecigs in your area to test or try out different gear before buying, unless you go with one of my two cig sized recommendations - you won't find them anywhere but online for the most part.