Over the course of my 25 year audio adventure I've seen many cabinet and driver types/materials go in and out of fashion. For example, with tweeters for a while aluminum domes were the rage, then titanium, then ribbons, then beryllium, now diamond. Same with woofers--paper, kevlar, aluminum, ceramic, etc. all have gone in and out of fashion over the years. Cabinets have undergone a similar set of trendy evolutions. What I find interesting is that all driver and cabinet materials represent a series of tradeoffs--none have resulted in a "holy grail" solution to problems of resonance, distortion, etc. I think what really matters (as many have said here) is not so much the driver or cabinet materials/designs but having someone with a good set of ears who knows what live acoustic instruments and voices sound like and who has the patience and determination to bring quality component parts together into musical harmony. I think that is what makes Lou's speakers unique. He brings solid wood cabinetry, the right mix of drivers and an extraordinary crossover network together in service of the music. I don't think exotic drivers or "cutting edge" cabinet materials are necessary unless your goal is a top flight marketing campaign. Having said that, I had posted earlier about how the new Wilson XLF has "reverted" back to a soft dome tweeter which a reviewer felt sounded more natural through the upper midrange than the more exotic material used in the prior model and I recently read in one of the rags that TAD uses a woofer in it's reference speaker with a corregated surround like the one found in the bass driver Lou developed years ago. So despite the fact that I would like to give little creedence to trendy developments in speaker design it does seem as though at least some well regarded designers are headed in your direction Lou--you trend setter!