I got the Emminence CD flares when I bought the Georges speakers. I have replaced them with some Altec 32B bent horns.

I found the CD flares to have a very small sweet spot and the Altecs add a lot more soundstage (used for music in my living room). From what I've gathered on the Pi and hi efficiency forums the soundstage often comes from reflected sound which I suspect the CD flares cut down on. For some applications you might want to direct sound so whether you want them or not depends on what you want to use your speakers for.

Grant.