I got a Sigelei 75w tc and it's pretty good. Hits hard if I want it to, feels pretty good in the hand, my battery doors don't rattle or fall off easy, Buttons and sturdy and clicky.
One down side though, it's battery life. I made a 0.16 ohm nickel build single spaced coil in an rta. I have to fire it at about 40w to 50w for a good performance and that means its battery life is probably about 4 to 5 hours. When my battery life is slightly under half way it won't fire the coil because of battery sag.
I'm on the hunt now for a dual 18650 tc device. Leaning towards the ipv 3 li or the ipv3 livr. I also like the look of the special edition snow wolf 200w. Comes out august 6th and they have fixed some issues that the original snow wolf had.
The ipvd2 sounds like a decent device but again, it's a single 18650 so expect the battery life to be kinda short if your running 40w to 50w.