Get the Trijicon HD's. I had the standard Trijicon night sights and I have shot a gun with the Big Dots. My M&P45 has the TFOs and my M&P9 Pro, M&P9C, M&P Shield 9, and my wife's Glock all have the Trijicon HD's. Hands down the HD's are the best sights. They are perfect for daylight, low light, and no light. Front sight acquisition is very quick and easy with the colored front dot and blacked out rear sight in daylight and low light. In no light you have the three tritium dots with the extra added bonus of charging the colored front sight. The HD's are worth every penny.