3) Vapresso Revenger X
My reasoning is it uses batteries you can swap out. Be sure you get a decent battery
charger and two sets of two
18650s of good quality. Keep in mind one set will be set A, the other set B. Keep these in their respective sets, or as is said, married.
The links I offer here are not associate links. I get batteries and chargers from the company listed and have had good dealings. There are other reputable vendors. The choice where you buy these are yours, as long as avoid Ebay or Amazon.
Please note, I'm not knocking the quality of either Inokin or Uwell kits. I know with very little doubt that the Innokin would be durable, and have read of good reviews for Uwell products. Convenience regarding the use of batteries is the main selling point for the Vapresso kit.