They're all regulated, I'm just learning towards SB's romisens because of the respect for their stuff around the web and the fact that it's making significantly less ludicrous lumen claims. It helps that one of SB's mods was to add the same XP-G R5 that the Fenixes use.
Shadow - try to find out if any of those lights are regulated, so that brightness is constant rather than varying with remaining battery charge.
Fenix have just launched an 18650 light, btw. It will cost more, but their quality is usually excellent.
Oh - and never leave an 18650 on charge and go out of the house or where you can't supervise it. Not if you're using a made in China super-cheap charger and cells. There's a slight risk of fire. High quality protected cells and the Swedish Pila charger cost more but are safer.