Both Cajun Gun Works and CZ Custom have sights that you cannot go wrong with. CGW's EZ 9/40 sight set is about as perfect as you will find for competition if you are looking for a set of fixed sights. If you don't like a deep notch CZ Custom offers a great competition rear sight that is hard to beat, fixed or adjustable. I like .125" rear notch and the narrow front fiber optic sight but you will probably have to purchase a few sets to find what is best for you. Sights are a very personal thing so some searching and experimenting will be your best bet. Any of the aftermarket sights are better for competing that the factory sights. One thing to keep in mind is that Dawson Precision makes a wonderful front FO sight that you can buy in different heights and widths to fine tune any rear you might like but they only make rear sights to fit the SP01, P01, Shadow, .22 conversion or P07/P09 guns. They DO NOT make rear sights that fit CZ 75, 75B or BD guns no matter how you read their advertising. The .125 rear notch sights are great with the .90, .100 or .110 width front sights but again you will need to experiment to find the one that is right for you. Some like the green FO and others swear by the red, it's all in what you like. I hope this will be helpful for you.