Have you ever heard of Microlab Speakers ; just spotted today one in a shop for USD 71 ; I am willing to change my Mercury 5.1 System to a reliable 2.1 system that has a good sound with boost. Reason: The 5.1 system has a lot of wires that are taking place. The Microlab M700u has an Amplifier Output Power of 46Watts RMS ( 14 Watt x 2 + 18 Watt ) ; Speakers 2.1 (15 Watt x 2 -4 ohm ) and a Sub-woofer (20 Watt - 6 ohm).
http://www.microlab.cn/product_detail.asp?id=384&bigclassid=15&smallclassid=70