I do like the no memory part of the C3 because you never have to deal with the flashy modes. The other nice thing about the C3 is the pill from the R5-A3 will screw in making into an XPG if you want a really cool mod light. A C3 would complete your collection of really cool AA lights. A Trustfire R5-A3 with no flashies I think I know were that one came from, maybe someday I'll part with the XML one.