Product Description
http://au.yamaha.com/en/products/audio-visual/hometheater-sy…
It includes the following amplifier from what I can tell …
http://au.yamaha.com/en/products/audio-visual/av-receivers-a…
I'm not sure on the quality of the speakers.
The 375 amplifier model is on sale for $296
http://www.harveynorman.com.au/yamaha-rx-v375-5-1-channel-av…
Comparison between the two amplifiers:
http://au.yamaha.com/en/products/audio-visual/av-receivers-a…
essentially, extra HDMI, and networking / airplay.
Not sure if Harveys / JB stocks this.. but could be good to try and haggle and beat the $598 price
meh.