I personally went through the "Protected or unprotected" battery thing because of having access to a huge number of high end protected 18650's.
A bit of a "battery lesson"......go with an Unprotected cell in your VAMO. Get good quality....AW, Panasonic, Samsung.....I've been using Joyetech and have been happy with them. Some people say to use a button top in a VAMO, but I suspect they may have the "old" spring in theirs. I have been using both types in mine and have not had any issues with the flat top batteries rattling. The new spring is a much heavier one that extends all the way to the inside diameter of the tail cap where the old spring is smaller and in the center of the tail cap leaving a gap to the outside diameter. Finally, you're going to see maH ratings....think "the amount of power a battery has to offer on a charge".
If you want a GOOD charger, Pila's are top notch but can be a bit expensive and hard to find. I've been using the new Nitecore/Sysmax Intelli Charger (there are 2 and 4 bay chargers....charge 2 or 4 batteries at a time). I've been using one for quite a while now with various battery types including my 18650's and it's by far one of the best chargers I've used. I keep my VAMO batteries in it, and don't pull them out until I need a fresh one.
So AW, Panasonic, Samsung, Joyetech UNPROTECTED....1900-3100 maH.....flat OR button top.....Pila or Nitecore charger. Done
Disclaimer: all IMHO. I'm new to vaping, but have years of experience with batteries, chargers and related. I'm sure there are plenty of other viable options out there and I'm sure someone will be along to add them. The amount of knowledge on this site is amazing.