Looking for suggestions... I purchased a 26.6 over the weekend and want to hear suggestions on night sights. I have a brand new set of Trijicon HD-XR sights that I purchased a year ago still in the packaged, but I really like the profile of the Ameriglo agent and spartan sights. I have Spartans on a 19.4. What do you all prefer and is it worth buying a brand set of sights?