I of course plan to get a REIN 3.0 and am stoked to see it will also run on CR123a; that was my sole complaint about their other lights. On the negative side I already have an OWL and a REIN 1.0 so it kind of sucks that they leapfrogged the 2.0 without ever really having 'em in stock. I like CPI but it makes me wonder if I wait a few months should I see if the 4.0 will be out by March?