any of you guys monocog riders?

I want to swap out the cane creek headset for a chris king one. stem and bars will probably come from raceface, Avid discs BB7s from somewhere, but im not sure about the cranks.

i have a square taper BB atm and want to upgrade it. what are some of the dimensions I will need to focus on when ordering? should i stick with a square taper design? any and all input would be greatly appreciated...

also, the mounting for the vstyle brakes wont be used when i convert over to discs... should i grind them off? im thinking about doing that then powder coating the frame some poop brown color for security reasons.