So I recently purchased a "new to me" Glock 27. It came with a Trijicon front sight, but has the stock Glock rear sight. This makes it practically useless in a no-light situation, so I'm looking to swap it out. What are your opinions on the best night sights? Should I go with a whole new set of TruGlo's or Mep's? Or should I just buy the rear sight for my Trijicons?