I have a Sig 239 in 9mm that I really like. It came with factory night sights. For some reason I find the front sight is difficult/awkward to quickly acquire. I don't know if it's the size of the dot, the color (or lack thereof) or what, but I sort of have to search for it. Anyone have suggestions for a good alternative sight system for carry and SD? The gun is a tack-driver, it's just not quick to aim.