Thanks for all the feedback! After lots of research and soul-searching I went with the SC52Fw. My priorities, in order, are 1)Size, 2)Efficiency, and 3)Brightness. I figure the brightness and efficiency on the 52 are plenty for my needs (I have an H600w and rarely even use the high mode, and when I do it's the 330 Lumen setting), and the smaller size is worth the sacrifice to me. Besides, if I really find myself jonesing for more lumens I'll just snag a 14500. I'm inclined to think the SC5 is the superior light, it's just not superior for me at the moment. I'll report back once the SC52 arrives.