As for tanks....remember I still use Kayfuns (happily) and the troll rda. I have a Triton (v1 I believe) and it sits. Just doesn't give the flavor that my Kayfuns do in my opinion.
I also have the Aromamizer (thanks Wharf!) but embarassingly enough, I have yet to build it and check it out. ***hangs head***
Everyone here in my area are going bonkers over the TFv4. Top fill, quad coils, several types of coils I believe (?), but a juice hog!!
I haven't tried one out yet though to know for sure, to give you my thoughts. We have crowns as well, and I know Bov loves hers! Again, I haven't tried one out to know enough to give my thoughts.
Kayfuns and Trolls....I do know (and love!)
Sorry I couldn't be of more help. Good luck with your decision and keep us posted.