Hi CharlieK
I'm currently playing with Kodachi, Kali and Discreete on vm to see what they're like.. initial thoughts are Kodachi based on Xubuntu for me
In terms of secure operation, privacy, ect.. it makes even Tails look pathetic. Kali i'm not too keen on as its really for ethical hacking and security testing more than being a secure operating system
Discreete looks ok.. but its still only in beta