I have a pair of AR-90's. I like them alot. They are being driven by my Dynaco mono-blocks, and at 60 wpc, they do very well. More power is always better for these speakers. Good high frequency reproduction and excellent bass extension. Mine are very accurate, not boomy or anything like that. They are good "rock & roll" speakers, for sure. Good luck.
Here are some pics of mine for comparison:
http://photobucket.com/AR-90