Today only, Newegg offers this Polk Audio Monitor 70 Series II Floor-Standing Loudspeaker in Black for $149.99. Apply coupon code "NAFVC10" and check out via Visa Checkout to cut the price to $139.99. With free shipping. That's $160 off list and the lowest total price we could find although we saw it for $8 less in January. It features two 6-1/2" subwoofers, two 6-1/2" midwoofers, and a 1" tweeter.
Note that the coupon is only valid for use once per account.