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E-Warehouse has a pair of L810's at $259.90

http://cgi.ebay.com/New-JBL-Studio-L810-3-Way-Surround-Bookshelf-Speakers_W0QQitemZ120149465007QQihZ002QQcategoryZ14991QQtcZphotoQQcmdZViewItem

You can't hear it but i believe it has been proven that the inner ear can "feel" those >20khz frequencies.