So I'm looking for a fiber optic set for my springfield xd9. My primary question is what's the best set up? Three green dots? I had too many issues with the standard white dots and painted the front a safety orange and the back a neon green. This has helped a bit but its short term. So should I get a red front and green rear? Or vice versa? What will work best for the human eye? If you recommend a brand id like to be able to swap out the fiber optic tubes.