Guess those Phillips speakers would be good for music in terms of lighting... but for pure power, you want the Z-5500's, unless you want to go all out on a proper stereo system with amps, etc.
Plus, its only a 2.1 set. A full 5.1 set even brings music to life when you set it to Pro Logic II. Trust me on that.
Surround sound with an overall power of 80W RMS (Z-5500's has 505 watts, so possible to go a lot louder without distortion)
Frequency 35 Hz - 20 kHz (Sub on the Z-5500's can go down to 33hz )