In Ceiling Speakers

I have a Pioneer VSX-917 7.1 channel receiver and a pair of Klipsch B-3 (synergy series) bookshelf speakers as well as a 12" Dayton sub. It is in my basement which is aprox. 28x60 and Dont really have the room for in wall's or more bookshelf or standing speakers so I am lookin for in - ceiling speakers, as I have a drop ceiling, has anyone heard anything good/bad about POLK RC80I, they seem to be in my budget range approx. $300 - $400 for 2 pair on ebay, but dont wanna buy something that isnt of decent quality. I am not an audiophile, but do like to hear music sound good Any suggestions would be greatly appreciated. Thanks

This system is primarily for music and an occasional movie or sporting event