My PERSONAL preference is to have the narrowest front sight possible. Also, I MUCH prefer a fiber optic front sight to a night sight.... Honestly, I went through all the same questions as you are now, years back. My FAR preference in a field, hunting, target or range gun is a good, narrow FO front sight and a black adjustable rear (bomar style). On a CCW, night sights are okay... but even still, I probably wont be needing sights when the SHTF cause it would be only 1-5y away).
As was said earlier, the sights won't make you a better shot, but they will make it easier on ya!
Also, YES, an RMR is the ideal setup for hunting (moreso that defense, IMHO) but is VERY expensive when done right. If money was no object, I'd get a melted RMR, yes. No question.