Actually, I think having a stealth with white or day-glo yellow paint on the front sight is all you need during daylight hours. At night, well, I hope I'm in a somewhat lighted area. As for rear sights, I'm beginning to believe that having two dots in the rear takes way too much attention off the front sight (for me).
I thought of putting glow-paint on the R9, but never got around to it. I'd be interested in knowing if anybody else has done that procedure.