Best Buy offers the Bose Acoustimass 10 Series IV Home Entertainment Speaker System in Black, model no. 40343, for $599.99 with free shipping. That's the lowest total price we could find by $99. This system includes an Acoustimass module with two 5.25" high-excursion woofers and four cube speaker arrays, each equipped with two 2.5" drivers in a twistable configuration.

Update: It's now available for in-store pickup only.