Best 18650 cells = AW brand protected cells.
Best rechargeable RCR123 cells = AW brand.
Best charger = PILA IBC model (And I mean by a very wide margin.)
Best primary CR123 cells = Any Made in the USA cells (SureFire, Panasonic, Streamlight, Duracell, Energizer, Rayovac.)
Best way to save money on CR123 primaries = Buy online (from a respected dealer), buy in bulk, buy Made in America cells. The first two in order to save money. The last, in order to make sure you are getting quality cells that are not cheap & dangerous junk that might explode.
Hope this helps.