I have a Sony 5ES and want to add a two channel amp so I can have a 7.1 setup. I was thinking of getting an Audio Source amp one, what do you guys think? My room is 30' long by 16' wide and the amp would be use for the rear surrounds. I can also wire the two rear surrounds in series and use the 6 channel amp on the Sony but I don't know how the Sony would react. The speakers are a pair of Swan Divas 2.1's and they are rated at 8 ohms. Let me know what you guys think?