I haven't heard any of the Athenas. Considering you found the highs in the polks to be too subdued in comparison (the majority of polks are bright) you may want to find some used klipsch reference II series. Those are extremely bright and forward sounding. Their new reference and reference premier series is much more tonally accurate. I would say they are less bright than the polks even.
Could you describe the characteristics of the sound from the Athenas you like and what you didn't like in the polks? Klipsch speakers, even with their new less bright series have a very distinct sound that makes even their smallest speakers such as the R 14m sound very large with a huge, highly focused sound stage due to their horns.