I am looking for buy a set of Trijicon Novak night sights for my M&P 40c. There are three options available. The SA37/SA37Y/SA37O, the green front and back, green front and yellow back, and the green front and orange back. Is there any arguments out there as to why one option is better than the others? I was thinking green/green, but if studies or data says green yellow or green orange helps targeting faster than I would like to hear about it. So is there a difference or is it all just personal choice? Thanks...