A lot of horn speakers have no time aligning....so the tweeter sounds hit your ear before the midrange. Klipsch have resonant horns and ordinary xover parts.....there is no diffraction control on them, as well. Also not open baffle....Open baffle gives more "open" sound. All this can be remedied with simple two way open baffle dynamic woofer and planar mid/tweet DIY speakers. The GRS planars are cheap and the Radians’s look really great too. Please see my website page for how to make these.....both active and passive versions are discussed. There will be people making these things (maybe you) so these super cheap killer speakers will be a reality soon. All designs discussed have at least 93db sensitivity.
http://tweakaudio.com/EVS-2/DIY_Bi-amped_super_speaker.html