AmeriGlo CAP:
I am using the orange front with green insert.
The orange stands out really well against every background and has a very thin black outline for precision work.
The front sight is very obvious, even when target focused.
http://i296.photobucket.com/albums/m...-22-04_386.jpg
The front sight appears darker and more red than it is.
It is easily centered, and contrary to my previous perception, the low sight height is not a bad thing at all. The front sight still presents a crisp edge for precision work (mine shoot to tip of blade at 25 yards with 115gr ammo, still need to check my HST). I really like that, as covering the target at that distance can be a little iffy for me.
The ProOperator rear has subdued tritium, so it pretty much looks like a black rear until lighting conditions bring the tritium out. I was a firm "figure 8" guy for a while, but having 2-dot rears does make vertical centering much easier and repeatable.
http://i296.photobucket.com/albums/m...-19-31_125.jpg
My rears are yellow, but I wouldn't mind if they were green, as the front sight's green insert is noticably more pronounced.
The rear has a nice ledge for one-handed slide retraction but isn't overly sharp or catchy.
I tried quite a few different sights and asked quite a few different guys about what they were using, and the CAP/ProOperator fill all of my needs better than any others so far. There are guys that I have a lot of respect for that prefer plain black sights, but I have had issues with certain lighting conditions and target colors that make that arraingement harder for me to work with than having a bright front sight or tritium (depending on condition). I was painting my front sights orange (tip I picked up from other action pistol shooters), and I noticed that doing so greatly increased my front sight pick-up and awareness.
I was using Warren Tacticals on my pistols, and my G19 still wears them, but if the CAP/ProOp stand up over the next few months they will probably be replaced.
I can't say that the CAP/ProOp is the optimal setup for everyone, but it works for me.