It really isn't a matter of what sight system is best for a given rifle.
The real question is "What sight system will allow me to make the best hits with this given rifle under these circumstances?".
For people with good eyesight, the factory irons are O.K. for most situations. A peep or ghost ring is better.
When we get a little older and our ability to see something that's the size of a golf ball at 100 yards goes away, then our ability to hit something the size of a golf ball at 100 yards goes away too.
For this situation, a good scope is the answer. It allows a person to precisely aim at a small point, even if it's beyond our ability to see said point.
Of course, there are a lot of people that put sight systems on their guns for the same reason women wear jewelery. They seem to feel like it makes their rifles (and by association, themselves) "Prettier".
For those folks, there is no accounting for taste.
My advice is to take an honest evaluation of your vision, and what sort of shooting you intend to do... And based on the reality of the situation at hand, decide what's needed for you and your rifle.
Unless you are looking for jewelery. In that case, buying something expensive just because everyone else did seems to be the way to go.