i havent seen their rmr fiber optic but if its even remotely like the acog i would go fiber. the chevron on my acog is brighter in bright sun than my wife's aimpoint on highest setting.
its worth looking at one before buying if possible to see for yourself
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent