In response to "Shiva" here previously, I would have to add that, if It was my theater I was building - even not having heard the speaker models he mentioned - I would not hesitate for a second to use any of the offerings he's suggesting you look at, over any typical home audio speaker offering, or even higher end B&W, Thiel, etc designs for a full on high performance home theater effort, you bet! And of course, not having heard any of these essoteric, ultra high sensitivity horn and active horn pieces in mention - even considering that other audiophile speakes out there might likely offer a more refined, better integrated, ubber-detailed and airy, sound quality - it's not telling the whole story about how any of these speaker systems will sound in absolute terms, with all sorts of material. HOWEVER. I have absolustely no doubt, based on the specs of these, that they would stomp the living bejesus out of anything else you'll likely ever apply to your sort of application, even surpassing 100% to 200% better overall dynamics and effortless power delivery than your typical home audio fare! - believe it!! Basically, you're looking at dynamics you'll find in a better commercial cinema theater here - serious speaker systems for no compromise thrills, slam, impact, and potency, if those priorities are important to you...and they are to me, in the context of an HT system.
For the record, my old little pair of Klipsch 5 1/4" bookshelf two way mini monitors were almost twice as dynamic and powerful as any other similarly sized home audio speaker I ever had! And yes, they were worse in other areas, and did best with tube gear - by far, sure.
However, since these exotic ht horn speakers mentined above are likely out of the price range being considered here, other Bang for the buck speakers you should consider, for seriously dynamic HT system applications, I think looking at the larger Klipsch reference speakers - or definitely the THX Klipsch's - like the RF7's or matching Reference Center all around, for LCR dubties, even, will be a no lose system for you! While not as refined sounding as delicate audiophile sensible designs, they offer strong detail (especially in upper registers), unbeatable dynamics in an affordable passive speaker, clear overall sound w good midrange, and powerful bass, of course. More over, they are mondo efficient, effortless, easy to drive, and coherent and focused for room friendly acoustics and room integration properties, for most untreated home environments.
I should add that, since everyone's tastes and appreciation for what a good speaker should sound like is likely personal, that you will have to audition and decide for yourself what kind of sound you like to here. For simply HT dubites however, I think you should strongly consider what's important in an effective cinema speaker. Look at what the pro systems use, what the industry uses for it's theater systems, and take it all in. Make your rounds, and chose your weapons.
Another consideration is powered speakers, loud spdeakers that integrate powered woofers for the bass. Used Def Tech speakers with powered woofers can be had for cheap around the net, used, and have a more tpical home audio sound to them, but still offer higher efficiency and a more powerful sound, thanx to powered woofer integration, due to their design parameters.
Just some thoughts
