Harman Kardon offers its HKTS20 5.1-ch. 120W Surround Sound System for $219.99 shipped. That’s a $380 off the original price and a match for the best price we’ve seen. Upgrade your existing home theater system with this powerful speaker setup. This 5.1-Channel package is capable of pushing out 120 watts of power. A powered subwoofer will provide plenty of bump on the low-end, if needed. Rated 4.2/5 stars.