I have an IPV3 + Carbon Fiber coming in vapemail today and I couldn't be more excited. I have read up on all three of the mods you mentioned before ordering and what made the IPV3 for me was the sealing back plate, dual battery, and overall look of the mod. I don't really care about the touch fire button or the internal charger because I would rather be safe and use a real charging bay. Also IPV3 has a new update out that reads your Ohm down to the Hundredth 0.01.
Use the search bar and you can find threads for all of these mods, so search up and make sure its right for you before you drop the cash.