Speakers for a large vaulted room?


I have a listening room that is new to me. I have had trouble with my gear in this room and I want to see if anyone thinks the speakers will make a difference.

First, the room is rectangular with a brick fireplace flue that goes floor to ceiling pretty much dead center of the room. from front wall(speaker side) to back wall; a distance of 23'. I sit with my back to the 2 1/2' fireplace with all the empty space on either side of me. The walls on either side of me are 16' apart and only 4 1/2' tall then the ceiling take over and goes to a 12 or 13' peak.

Second, I am using an SP-6 preamp, V70 power amp from audio research and Magnapan IIIa's. I realize that the Magnepans need more power so I wanted to go with PSB Synchrony one's.
sonorous1
I'm at a loss as to how noone has pointed out the total disconnect of comparison between Magnepan and PSB.

The issue, primary issue for me, is the day and night difference in presentation between the two speakers. That's fundamental to this whole issue.

Good listening,
Larry
Sonorous1,
You want to keep your current amp,then the advice from johnk and duke is right. You need efficient and easy load/drive speakers(minimum92-93db and load of at 6-8 ohms, the higher the better). Your amp will sing and come alive with this type of speaker, and avoids the chase for ever more powerful amplifier syndrome. There are many good dynamic speakers to provide excellent soundstage(so you don`t have to rely on panel speakers exclusively).
Hi Sean,

I've been trying to get in touch with you on HTS. Can you get back with me?