I have held a Zenesys SideWinder and wow. You can add a Kick to that and have variable output. The down side is if you like to move your output around and with this you'd have to pop out the kick to do so. The Provari is highly recommended by many. I have a Zmax and really like it.
With a long, long history in motorcycles I can tell you that it is unlikely that you'd ever feel like you are done. Those riders out there will understand the term "farkle" (Function and sparkle). I continue to do farkles on my bikes and I'm sure I'll do the same with vaping as I enjoy it and I enjoy trying out stuff. I have a very small number of buddies that like their bike the way the manufacturer built it and don't buy new bikes or farkles but they are by far in a minority. There is nothing wrong with finding what you like and never changing and there's nothing wrong with finding what you like and trying to find more. One is just cheaper over time.
With a long, long history in motorcycles I can tell you that it is unlikely that you'd ever feel like you are done. Those riders out there will understand the term "farkle" (Function and sparkle). I continue to do farkles on my bikes and I'm sure I'll do the same with vaping as I enjoy it and I enjoy trying out stuff. I have a very small number of buddies that like their bike the way the manufacturer built it and don't buy new bikes or farkles but they are by far in a minority. There is nothing wrong with finding what you like and never changing and there's nothing wrong with finding what you like and trying to find more. One is just cheaper over time.