I use my SR9 in competition with USPSA, so I have contemplated the sights issue with this gun for a while.
I shot my first couple of matches with the stock 3-dot sights, and I wanted something more.
I then blacked out the rear dots, and that helped, but I am still yearning for more visibility of the front sight.
I recently ordered a HiViz green fiber optic front sight to install, but haven't received it yet. When I get it and install it, I will update my findings. I am hoping that the stock rear sight will be adequate, otherwise I will have to start trying to figure out a way to get a target rear sight on the gun, of which nobody of my knowledge makes. Stay tuned!