Vandersteen Model 7 in large room with power music

I will be listening to the Model 7s tomorrow at Audio Connections in NJ. My room is 32 x 18x 10 and I listen to a lot of power type classical music. These speakers have been criticized by TAS (Harley) for not being good at loud levels in large rooms. Anyone have any experience with this speaker in that situation? I now use RS1Bs which are very dynamic and are great in a large room but have no where near the transparency of even the Model 5As. Still I do not want not can I afford to spend big bucks on the large Nolas which I heard at Lyric and really liked although $45,000 would still be a large financial stretch for me. Comments. I would be using VTL 300s with the speaker and a Spectral 20 preamp.