I'm not disagreeing with any of you guys regarding what works well for target shooting, aging eyes, etc., but I did want to say something about the structure of very low original front sights and "V" notch rear sights. I own several antiques and that is the common pattern on them. If one was to read this thread and not give it further thought (as a new arrival to the forum might), a person could conclude that the old gunsmiths didn't know how to make a good sight, and that perhaps the old shooters didn't really know how to shoot, either. I'd suggest that the difference is simply in the kind of shooting they were doing. A very low silver "barley corn" sight does well with a V notch for quick confident shooting. On sights like that, when you pull the rifle up and you see the front sight in the notch at all, then you are ready to go. Nothing more to be done. No vertical movement to deal with. No horizontal movement to deal with. (If you haven't looked down the sights of an antique with that configuration, then I hope you will try to find an antique with that configuration at the next gun show you attend and see what I'm describing.)
I agree that the V notch doesn't work well with a tall silver blade, but I'd suggest that the problem there is that that blade structure provides too much of a vertical image in relation to the structure of the V notch rear sight.
That said, I'm not suggesting that anyone on here need to build old style traditional sights, and I certainly agree with the suggestion that it's wise to install sights to match the type of shooting a person intends to do.