Best is going to be very subjective - so the question really will end being what is everyone's favorite lol
I had a similar conundrum recently - looking for a
mod - and I finally got it down to between 2 PV - the GLV and the Buzz. I went for the Buzz in the end as I still like to vape flavors at 3.7 as well as 5v and having the option was something that appealed to me. I also prefrred the shape of the Buzz.
I did write a sort of checklist which I found helpful - things like cost, voltage, look, connectors, battery life etc etc.