Sub is awesome, but 3.5 is just too small to cope with it. Also 3.5 gets easily overwhelmed on higher volumes. Definitely sub 8 should be paired with eris 5.
Nice. First song sounded really good with the sub, wish you woulda played it all the way. I would sit here and just listen to music with that sub. I connected an old crappy Logitech sub to mine and its better than it was listening to the speakers by themselves.