I think the issue with a smaller horn driver is that they're tremendously efficient in the upper registers, but then in the lower they're not quite as efficient. Which means that going with a smaller horn obligates one to use several midrage/woofer drivers to complete a full range speaker. This would defeat the proposed soloution of lessening the size of the speaker by going with the horn. I do like the sound of a horn, but I find that my ears (personally) always love the sound of a very good ribbon tweeter. A high quality ribbon delivers a clarity I find hard to beat (as always, however, this is just my opinion). The sad fact about ribbons, however, is that normally they're poorly implemented and therefore have a rather harsh sound to them. Alas, what to do?!? Outlaw speaker set, eh? Perhpas they're ahead of you. Any HomeTheatre enthusiast knows that the sub is the key to the movie, and here we have an LFM1 coming, a hint maybe?