Will not defend my recomendations on any level. Will explain them though. This is a large room you are working with. Electrostats will not reach the absurdly loud volume levels that horns will and will not sound like the local cinema multi-plex. They will reach reasonable volume levels with the big ol' Parasound amps for anyone who still has enough hearing left to tell the difference between quality components (can we give him credit for still having this ability?). The Logans will do something that few other speakers will do though. Because the sound comes from a curved pannel approxamately 4 ft in height you can expect the seamless integration of 7 speakers in a huge room (given good processing). No you will not be able to reach the volume levels that you would with 7 JBL horn-loaded speakers. If loud were your only concern you would not be at this level of gear though. Also in a room that size you will benefit from two subwoofers and a pre-pro with great tweakability. Since your budget is larger than I thought you may want to consider the Lex MC-12. Do qualify your installer though. A good installer can make a 10K system sound better than many 40K systems by proper speaker placement and processor set-up.
Good luck!
Good luck!