I was curious about the similarities between them... and it seems like older DTs were a little better, perhaps.
Admittedly, I have been a little interested in Polk. Haven't been anywhere that has them though. Always been intrigued by the comment about them 'needing' a lot of power considering they have good efficiency and minimum power rating of 50w (up to 500w) for the RTiA9s. Likewise, the LSiM707s (20-300W... and a non-powered "subwoofer". Probably not my style, but curious none-the-less, perhaps downright nostalgic, considering the reputation I remember growing up. *shrugs