There in lies the question. I like the iron sights of the C and I am planning on getting a k conversion kit, that way I can switch between a K or a C whenever I wish. as opposed to getting a K and being stuck with a K. I dunno its just the way I do things. I'm sure it'll be more costly in the long run, but I'm willing to pay for what I really want, as opposed to paying for something I only sorta want. But the major factor is the compactness of the C.
I dunno, call me wierd, call me crazy, but whatever you do, don't call me derek.