Not familiar with your choices, but as an ex smoker, I did a lot of research on the various forums, and it seemed the best tank for MTL ex smokers like myself was a Nautilus2. They make a kit called the Zelos which is a small mod and the Nautilus 2 tank. Love it, is great. Easy coil replacement, great overall. I've since tired of replacing the coils (and paying for them), and now use Kayfun Mini V3, but I highly recommend the Zelos for a starting point for ex smokers. I still use it occasionally.
Oh - and available for less than $50.