I have the EGW HD mount on mine. Very stout and secure. I don't care for the rails that secure with the screws from the top. Just my personal preference.
The best is Murphy’s. Pricey. Mid line is EGW and works great. Dip is fine and least expensive way to go. Pick your poison. Seekins rings are my fav. I think I used lows on my Cz and found some used ones for under a hundred.