Wondering same myselfthough assume your statement is right.This "non" reponse will allow me to see if anybody can say with some "authority" between two speakers.Have heard Krell and was thinking of it verus B&WNautilus used.If I had the $8K and room I get 803Diamond whose tweter is amaziong.Everything I have read about both speakers speaks of high peformance with bang for buck tilting I guess to Polk.Can't say that about every speaker they make but 15i seems to be a winner though I had nothing to complain about with Krells which I think lend themselves to HT more than the B&W I heard in same room.
Chazzbo
Chazzbo