Hi and welcome to ECF.
Delivery Systems
atomizer/ atty- an element on to which 3-4 drops of juice is dripped
cartridge/ cart- a container with sponge (filled with juice) that is used with the atty- juice drips on to atty from cart and is vaporized
cartomizer/ carto- metal tube with stuffing and element.
carto+tank- a carto with a hole punched in it. Carto is than placed in a glass, metal or plastic tank which is filled with juice- juice saturates carto by way of hole in carto.
Clearomizer- a plastic or metal tank with a wick and element. Contains NO stuffing.
I began with Boge cartos and moved up to 1.7 Smok Tech XL cartos. Next I went to carto+ tank. Am now using V2 Stardust clearomizers and am quite happy. Although they are rebuildable it's not easy. The new V3 Stardusts are easily rebuildable and you can buy extra wicking/ coil parts for them.
Some swear by the Vivi Nova, another clearomizer, but they are quite expensive.
I heard good AND bad about both the Stardust and Vivi Nova.
Edit: This is the tank I used- doesn't look so pretty but super easy to fill.
http://momandpopvaporshop.com/tanks/