Adorama offers the Polk Audio LSiM 704c Center Channel Speaker in Midnight Mahogany for $319.99 with free shipping. That's $5 below our January mention and the lowest total price we've seen. (It's the best deal now by $430.) It features a 3.25" mid-range driver, 1" tweeter, dual 5.25" woofers, 70Hz to 30kHz frequency response, and 8-ohms impedance.