I have the first version of the Rokkits, I demoed the 5, 6, and 8. The 6's were the best to me. The 5's lacked in the low end, and while the 8's had the most low end, they were just boomy sounding, not very clear at all in the mids and highs. The 6's had good mids and highs and enough lows to not feel empty down there.