Luckily, one of the first things I tried vaping was a cartotank. I started with bridged 510 dripping atomizers that came with my ego-T kit. I used a clearomizer like the ce4 that came with my varivolt kit, but I got a carto tank that was screwed up by not knowing about steeping.
I'd have to recommend IBTanked carto tank(glass) or polypropylene DC tanks, less hassle than with clearomizers, as long as you prime them correctly. I use smoktech 3-hole cartomizers from smoktek.com, but preferences range in cartomizers..really any delivery system..as much as liquid flavors. I guess try a few, so you figure out a good match for you and your liquids. Ikenvape, smoktech, and boge are the few that are really popular.
But to get the "best tanks" out of the way...cartotank, protank 2 or 3(minis too to look good with ego), if your ego is variable voltage iclear 16, 30, 30s. You'll want to get a collar/plinth for your battery if you get a 510 threaded atomizer, which most quality ones are.