Oh how I love the C2. It was my first Surefire and after EDCing a few others I have gone back to the C2. I currently own two C2s in Glossy black and just ordered a HAIII today which will be the new EDC along with a Z48 tail cap and Malkoff M60. I absolutely love that combo as it's durable, bright as all get out and the tail cap, well, I'm a clicky fan, plus I like the guard on the Z48 so I don't have to worry about it turning on in my pocket, plus you can tail stand it. The Clip is great too for my setup as it rides in a side jean pocket or can go on a belt, no holster necessary.
There are a ton of P60 drop ins like the Malkoff M60 so you can setup this light just for you whether you want ultimate output and throw or something that is bright but will also run for a long time, options galore...