After professing my love for a bead/Shallow V sight, you think the XS sights are OK?
I think you should look into a dual color NS system. Some high speed .mil use it.
I'm not a fan of XS. I've had quite a lot of XS sighting equipment and think better kit exists.
Remember, I'm a guy that tests lots of gear. When I find something that works and works and works....I stay with it.
Maybe I should start a "Architect Approved Kit" thread.