I have 10. Three Headlamps, Six SC models, and the older model S600w MK II. That number is increasing though. Since they were on sale, i bought an extra H602w, and will most likely buy a H603w and possibly a H502w in the near future.
H600W MkII, to me it's a nearly perfect balance of compromises. I'm pretty stoked to get a few spares now that they're marked down.
My first one has survived daily pocket carry for a couple years now, I'm completely sold on this make and model.