Stickman, I think you are making a mistake. If you want a big sound with lots of space you are headed in the wrong direction. Just because these speakers are big does not mean their sound is. They are point sources and acoustically they are not much larger than LS3 5A's. If you want bigger with more space and power you go for larger line sources. If your ceilings are 8 feet go for Sound Labs 845's. If they are 9 feet go for 945's.
I am intimately familiar with 20.7s. I currently own Sound Labs 8 footers. The Sound Labs are a little more efficient than the Magnepans and produce much more bass, you actually might have to turn the bass down!
They produce a better image (more defined) and do the disappearing act better than any speaker I have ever heard. If they do not go loud enough for you just add subwoofers and you can shatter your windows. You will still need at least 200 watts/channel. I use Parasound JC1's.
I am intimately familiar with 20.7s. I currently own Sound Labs 8 footers. The Sound Labs are a little more efficient than the Magnepans and produce much more bass, you actually might have to turn the bass down!
They produce a better image (more defined) and do the disappearing act better than any speaker I have ever heard. If they do not go loud enough for you just add subwoofers and you can shatter your windows. You will still need at least 200 watts/channel. I use Parasound JC1's.