@JBLee: Are you using the Cajun fiber optic/black rear on the 75 full size? I think @MattStainless uses these, too. You mean there's a half inch of the front sight closer to the rear sight? Or some other thing? When you look through the notch, is there any breathing room or does the front sight fill the notch? I've tried black rear, but in lower light, I found it a little difficult to find where I was on the vertical. That may be a matter of practice. Dawson has a front (red) and rear (green) fiber optic, but I don't know if they make them for CZ 75 series. They're pretty nice though.
@Tim/Kissofdeath: Trijicon is a maker of various optics, including tritium sights. They sell not only their own sights, like Bright & Tough, but also sell parts to other companies. I have a feeling that these companies do a lot of commerce with each other.