I have Lyman tang sights on a couple of antique Winchester rifles. Very effective when properly mounted, zero'd, and used correctly. Function of aperture-style sights must be understood first:
1. The human eye, when looking through the aperture sight, will automatically seek and find the center. All that is required is that the shooter focus his eye on the front sight and align it with the intended point of impact. It actually requires a conscious effort on the shooter's part to misalign the sights because of this tendency to focus on the center.
2. Aperture-style sights generally provide a much broader view of the target area (actual target as well as surroundings) than other types of metallic sights. This can be an assist in hunting applications.
3. Tang-mounted aperture sights provide about the longest possible sight radius (distance between front and rear sights) which, in itself, aids in accurate shooting.
4. Just about any type of front sight (post, blade, bead, globe) can be used with aperture sights. Choice will depend on the intended purposes (globe sights work very well for well-lighted range use and precision shooting, while bead sights seem to work best for general hunting applications in which lighting conditions, terrain, and fauna are common factors). Front sight height can be a factor with some aperture sights; more so with receiver sights than tang sights because of the greater range of adjustment allowed by the tang sight.
With regular practice at various ranges the experienced shooter will develop a good feeling for any necessary change in sight picture (holdover, etc). I usually zero my hunting rifles to shoot about 3" high at 100 yards, allowing me to use the same point of aim on game animals between 50 and 200 yards (yes, some variations exist due to caliber, load, bullet style, etc).
I hope this helps you make your decisions.