I've got the same setup on my CZ 75b, and it is a significant improvement over the stock front sight. I tried the red and green FOs but also like the red better for the front sight.
I bought the 2.75mm wide X 5.5mm height sight with the 1.0mm FO from CZC. I like the narrower sight width which makes picking up the front sight much easier for me. They also make a 3.1mm wide sight with a larger diameter FO, which would be very close to the width of the original sight.
If anyone is considering doing this, the 5.5mm height sight is typically the drop in replacement for the factory sight. Just to be sure you might want to measure your current sight first. Anyone considering adding the competition rear sight in addition to a new FO front sight will need to get the 6.5mm front sight.