Why not just buy a 6700 if you're buying a B150? Kinda pointless buying a 6700K.
Because it has clockspeeds that I am happy with out of the box. I probably would have felt the urge to overclock the 6700, which would have meant 40 extra on mobo 30 extra on cooler. I also wouldn't have felt 100% comfortable doing it considering temp readouts wouldn't have been accurate.
