For today only, this Polk Audio RM705 5.1 CH Home Audio Speaker System drops from $499.99 to $174.99 to $149.99 when you apply the code EMCSRDDB3 in your cart at Newegg. Plus, the shipping is free. This is the lowest price we would find for this set by $25. This 5.1-channel surround sound speaker set includes four satellites, one center channel, and one downward firing powered subwoofer. Overall, the system has great reviews, especially at Amazon where over 250 reviewers have given it an average rating of 4.5 out of 5. There is no sales tax (except CA, IN, NJ, and TN).