I'd be real concerned about dropping money on anything that plays sound without being able to hear what it sounds like. Further, at that price point, it would be a miracle for the 6 speakers you're getting to sound "decent" or "musical" -- likely they'll sound little better than your tv sounds as-is
What is your goal? -- playing music, amplifying the tv, watching surround sound movies, etc.?
Do you really need 5.1? If so, perhaps Nick's idea would land you with an acceptable alternative for that.
The leftover $$$ could either be held and put toward a better sounding music playback system (a pair of new small bookshelf speakers and a older receiver rescued from goodwill, etc. could be had for around $200), or invested in a nice pair of headphones and a headphone amp (grado sr-80s and a cmoy design amp or a grado amp clone) to give you a spectacular sounding personal playback system