What's your opinion on the best tank for daily use?
I was using vision ego clearomizers when I started. They were pretty good. I've been using the Kanger Evod. I like it, it's easy to fill, easy to maintain, if something goes wrong with the coil/wick it's at the bottom so you don't have to waste liquid if something goes wrong. Some people have had problems with leakage and flooding. They've worked pretty well for me.
Think about getting a glass tank for the long haul; after a week or two with my glass tank, tasting my earlier plastic tanks I could taste the plastic in the liquid distinctly--- well except for the plastic v-nano that had a high nic eliquid in it; I guess once you have high enough nicotine in the plastic tank you might not even TASTE the plastic ... which is kinda scary unless you just don't care.