I particularly like the Trijicon "fiber" rear sight. Annoying thing is they don't sell them separately. The Trijicon fiber front is trash, in my opinion. The rear is nice in that the notch is narrow but DEEP. I really wish more manufacturers would take advantage of having a deep rear notch. You just get so much more feedback tracking the sights in recoil when you have X percent more notch to ride the front sight in, but maybe I'm just a weirdo.
Here's those Trijicon fibers on my P6. Yes, I bent the front on install because it's a POS. I'll probably replace the front with a Warren .115". Also over-filed the rear so ignore the bare metal.