Pete - you have got me confused. Did you really find that running just the panels and a sub was better? The woofer (not sub) on the Aerius i goes way into the mid-range. There are not too many subs that perform well in the 120Hz to 250Hz region, particularly if you only use one sub. What sub did you use? Otherwise, I agree that the Aerius i will often outperform the SL3.