World Wide Stereo via Sears offers the Definitive Technology ProCinema 60.6 5.1-Channel Home Theater Speaker System, model no. PROCIN606, for $319.99 with free shipping. That's $379 off list and the lowest total price we could find, although we saw it for $25 less in June. (It's also $29 under World Wide Stereo's daily deal price.) It includes one center speaker with two 3.5" upper bass/midrange drivers and a 1" aluminum dome tweeter, four surround speakers each with one 3.5" upper bass/midrange driver and an aluminum dome tweeter, and one subwoofer.
Of note, Shop Your Way Rewards members will earn a Sears credit with this purchase and may be eligible for additional credits and discounts.