I can tell you what not to use. Protank 3. I'm still fairly new to this, but I can't any vapor out of this with the vv v3. The cheap evod tanks work way better. I took my setup to the b&m where I got it and they just replaced the coil. So, 3 coils later and it still sucks. Someone suggested buying a variable airflow piece for it, but I hate throwing money at something that doesn't work. Needless to say I am looking for a good tank as well.
Buying the airflow control valve is worth the $5 or so you will spend. The PT3 is what I use most on my VV, and it is great...especially once you start building coils for it.