I agree, Joule/Joseph was certainly one of the best rooms. Another was the Marten Design/EAR room with EAR electronics driving the new Coltrane Alto speakers, $22K (not to be confused with the original Coltranes). Also, the Musical Surroundings room with the Acapella Arts horn speakers (have I got the name right?)--wonderful!
Other good ones: Fried, Plinius/Harbeth and also Harbeth/Plinius.
The new Vandersteen Quattro was news to me--had that been shown before? It's a $6500, tall svelte pyramid with powered subs.