FWIW....
-$50 for the DNA20 is a steal IMHO
-The Zmax circuit isn't even playing the same game, let alone in the same ball park as the DNA20. I bought a Zmax and went back to using a kick before the DNA20 came out, I hated the vape of the Zmax.
-Keep checking Evolv's website for stock, I have always found stock in 3-4 days. If that doesn't seem to be the case contact Evolv thru their website, they have some of the best customer service I have experienced.