For a fiber optic, I really like my TFO sights. I have them on my G26 and it's on the front of my P220 Equinox. I've also had them on previous weapons. There are some "durability" concerns with these if you look around on different sights. Some people have reported them breaking. I had a vile come out of one of my TFOs that I had on my XDm 45 in the past, and when I contacted TruGlo, they replaced it with no questions asked, even though I bought the sights on eBay. I've never had any break and my weapons typically take a pretty good beating. It's my theory that the tube came out because of my gun cleaner being soaked into the sights. Either way, I'm a big fan of them. I do like my SigLites which I believe are made by Trijicon. It just depends on what you want.
Good luck with your search!