If you want TC and high wattage, I say get the IPV3 Li or VR
1. Yihi SX330V3SL chip, the best TC I have ever had is on this chip. Gets hotter faster then my SMOK xCubeII
2. Accurate to 3 significant digits (ie, when firing I see 0.42, when I press +/- it shows me 0.417)
3. I have tried Ti on a Troll RDA with it, and it works really well. I have also done Ni200 with smooth vapes.
4. No lock function, but it takes 3 seconds to boot, so I don't mind and usually turn the mod off when in pocket.
(edit) 5. The battery door is a slider and ball pin, it closes very firmly. The ipv4 has a clamshell cover that slides off all the time.