Newegg offers the Klipsch Quintet IV 5-Channel Home Theater Speaker System, model no. 1014526, for $179.99 with free shipping. That's $20 below last month's mention and the lowest total price we've seen. (It's a current low by $24.) It includes four satellite speakers and a center-channel speaker; these handle 50 watts and 75 watts of power RMS, respectively. Note that a subwoofer is not included.
Newegg offers the Klipsch 10" 450-watt Powered Subwoofer, model no. SW-450, for $179.99 plus $1.99 for shipping. That's tied with our mention from three weeks ago and the lowest total price we could find by $34. It features a 10" down-firing driver, frequency response of 28Hz to 120Hz, and class D amplifier.