I've personally found the C-More too much of a pain to deal with when zeroing (not to mention drifting off zero). The Eotech has as much periphery view as the C-More. The non-powered optics like the Trijicon Reflex work well except the brightness level can't be adjusted manually and they have a tendency to wash out sometimes, especially shooting from a shaded area into a bright area.
I'd stick with an Eotech or an Aimpoint. Just set the power setting to somewhere in the middle range and you're covered for about 90% of the shooting envrionments you're like to encounter at any point.
As to iron sights, I think they're just fine as long as you use the right ones. Like most who've owned rifles for a long time, I started off on iron sights and fight them to be like an old friend. You don't see each other for a while but when you do, it's like time hasn't passed. Having set that, once you've gone with a good optical solution, you're not going to want to go back to irons unless you have to.
I personally prefer the Eotech, but like the Aimpoint too.