The Ultrafire C3 is my current favorite for EDC. DX has it priced just right. But in dealing with DX, my trick is to order more than one and, like NAro said--don't be in hurry. I try to get 5 at a time because it's very likely that a couple of them will be DOA; have crappy soldering or mangled threading. Of the one's that do work, I'll keep the brightest and best tint for myself, and the rest for gifting to friends or for backup. The DOA ones get RMA'd back to DX. And a month or so later, their replacements might show up. Then repeat, send back the DOA and keep the good ones.

I don't have the Q5 version yet, but that will change. I have yet to use the C3 in harsh environments. It never dawned on me that is what all the extra $$ goes towards when you buy a Fenix.
I had a couple of Fenix L2T's a few years ago. The finicky tail switches and easily fouled contacts really left me with a dislike for them. I'm going to have to give Fenix another try someday but I just hate the thought of spending over $50 for a Fenix when I can have an Ultrafire C3 and a few backups for less.