if you want a good sized, very configurable mod then go for the Joyetech VTC Mini or vTwo Mini. Both are excellent mods, go up to 75W and can do TC with a variety of wires. Get a good quality 18650 battery and you're good to go. If you would prefer a device with a built-in battery then have a look at the Cuboid Mini by the same company.
For a tank, the Crown 2 is a decent one for direct lung if that's your thing. Not good for mouth-to-lung though if you vape that way. If I were after a tank for direct lung that took pre-built coils then the Crown 2 would probably be the one I would get at the moment.
The Atlantis EVO is worth a look too. I have two of them and really rate them for flavour. Very small capacity though.