Traditional is just that traditional. Just because it's "traditional" doesn't make it better. It's utter nonsense that iron sights and fundamentals are often mentioned in the same sentence. Fundamentals do not change regardless of the sighting system!
That being said learn and practice with what you intend to be using or try them all out to see what you like. I perfer open irons on my pistols. I just don't like the battery thing or the extra bulk.