I may have them in my room soon as well. We will see.
I've been kicking around a controlled directivity horn speaker for several months now. I've considered Earl Geddes and the JBLs. To me, those are among the best. I know Duke does it as well and I'm sure they are great too. I've followed a couple of threads on DIYaudio about waveguides too. I'm not planning on selling my YGs. I am looking for a different speaker design which can play better for really loud and dynamic music. My room is 14'6" wide and I want a speaker which can give me a wide sweet spot but be able to control at least some of the energy reflected from lateral walls. Waveguide speakers could be the answer depending on the setup.