I'm in on the TruGlo TFO's. I have them in all green and I tried green front, yellow rear and I much prefer the all green setup. The yellow rears just seem pale in comparison.
Trijicon night sites are pretty good too--I have a couple guns that came with them and rather than pay to swap them out, I was impresssed enough to keep them, although the TruGlos really stand out visually better.
In a worst case scenario, environment wise, involving lots of rough handling, dirt, etc. (out in the field for extended periods), I'd probably carry Trijicons, but I have a full size XDM 45, with all green TruGlos that's been in my car's glovebox for years, through south Georgia's extreme heat, humidity and rough roads and it is just fine
I got a really good deal on my M&P's TruGlos, paying close to cost, with free installation by a S&W trained armorer when I ordered my M&P new. It ups the price initially, but in the long run I usually save by having my sights installed on a new gun when ordering, as well as picking up a few extra magazines and a holster then and there, if needed.