Is you have a budget only 120$ You may want to consider 2.1 systems, since with 5.1 you need good RMS watts speakers if you want to hear something from your rear speaker, also with the cable limitations is often difficult to install the rear speaker, but i guess it is a personnal choice. Personnaly i have a altec Lansing 5.1 kit, and i will go in 2.1 next time.
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