I'm attempting to decide on acquiring one of the following: Fenix LD10 R4 (or R5 now, not sure?), Lumapower Trust Model 1, or the Quark tactical AA. I guess I could wait awhile for the Zebralight SC 51, but it's at a slightly higher cost. The other three are pretty much equally priced; I've tried to read about the features of each, and I'm currently leaning toward the Trust light. Anyone owning all or some of these would be welcomed to provide their input.