Amazon has the Energy EAS-8C In-Ceiling Speakers (pair) for $80 with free shipping. Normally found for $200+ on the web. Features 125W power rating, 1" aluminum dome tweeter, and 8" injection molded woofer.
eBay with World Wide Stereo has the Energy Veritas V-Mini-C 2-Way Center Channel Speaker (Rosenut) for $75 with free shipping. Features two 4.5" woofers and a 78Hz-25kHz frequency response. $120 elsewhere.
$20 price drop. Newegg has the Polk Audio PSW505B 12" Powered Subwoofer Single for $150 with free shipping. Features a built-in high current amplifier, adjustable low-pass crossover, phase switch and subwoofer volume control.