Here's my current kit.
Batteries: Innokin MVP 2 VV/VW, Innokin Itaste V3 VV, Ego V VV (in disuse but a backup)
Tanks: SmokTech ARO Pyrex (favored tank), KangerTech AeroTank w/ Stainless Tube replacement, Airflow Control (fallen to disuse)
Heads: SmokTech stock 1.8, 2.4oHm, or reconditioned...