Okay, I figured screw it and went ahead and installed the S&W factory V7-style Trijicon rear night-sight today along with the rest of the Apex duty package (the trigger action is so sweet now, so I'm sure I can tighten up on already good groups!).

Sorry the pictures are so ******, only have my iPhone available right now. Now if I can get the front sight issue resolved, apart from a few more magazines and Arredondo magazine extensions and a grip stippling job from Boresight Solutions - I'll be a very happy camper.