Which of the four replacement speakers mentioned above is the less shrill or tinny sounding? I may try a replacement set but don't want the uneven shrill highs that sometime accompany a swap out due to ohm matching and other factors. I understand sound is subjective but let er rip with opinions.
IME, tweeter material is usually a big indicator of how the highs will sound. A metal (Titanium, pei, etc) dome will have natural bright characteristics and can to some sound shrill. This isn't necessarily bad. Many instruments are metallic as well (cymbals, guitar) and for some people, they prefer it.
Silk or textile tweeters will have a softer undertone. They won't be quite as bright. If your ears are sesitive to high frequencies, you make like this.
This is all a personal preference.
I love silk tweeters personally. I'm running the infinity as well and they're quite good for my ears.
JL, Infinity, and Polk are all brands that tends to be softer.