Looking at a new EDC light. I'm torn between the Quark AAx2 and the CR123x2. I like the size and performance of cr123 lights but I'm sick of feeding them. What are my options for rechargable batteries? Are they as powerful as the normal batteries? How about run times etc? What are good brands and is it worth the trouble getting set up with this? If it's too much trouble I'll go AA. Any info or opinions would be great.