Could not agree more. The complication is once you have a flat panel display. It steers you to horizontal centers and none of them are truly full range at required SPL.Just get a full-range center speaker and enjoy the full-range signal in the center channel! If you've not had a capable center speaker, you may not realize how much deep bass(not LFE) is in the center channel, especially in action movies. After all, the center channel in movies is a discrete channel with its own sounds, and it carries more than just dialog. Why would you want to shuffle that off to the front L/R speakers?
While my Revel 426, which is one of the largest horizontal centers, goes down to 30hz in room, it can’t do 30hz at 105dB. Arendal has even bigger center with 4x8” woofers in their 1528 series but never heard that one.
Not that I am recommending it to others, but I strapped a small SVS sub to the center to make sure it can do close to 105dB at 30hz.