After reading the informative review on this light I'm going to buy one but I have a few questions which I hope you guys can answer. I will only use the light with CR123A batteries so is the 3V-6V LED the best option - is this better regulated that the LEDs with a greater voltage range when using primaries. Secondly the light is available with either an R2 or MC-E emitter (I think). The MC-E is more powerful at a stated 500 lumens but throw is important to me. Will the R2 throw farther than the MC-E and does the MC-E have heat regulation problems if used for extended periods in this type of light. Finally will the stainless steel bezel rings that are used on the standard L2's fit this light. Thanks