Everyone is entitled to their opinion(s), but I have to staunchly disagree that the AQ sounds better than the SA. I have personal experience with both products and before powering up with driver it is quickly apparent that the AQ has a concrete (very stiff) suspension and an overall inferior suspension to the SA. The SA uses a nomex spider that is more compliant than the AQ, and the parameters are more adapt to being used in sealed enclosures and ported enclosures - whereas the AQ leans heavily towards ported enclosures. And listening to both drivers side-by-side in similar sized sealed and ported enclosures one thing is immediately noticeable: The SA plays lower. A LOT lower. Assuming that both drivers have a fairly similar inductance to one another (both coils are close in Le) and knowing that the SA plays considerably lower, the SA plays a much larger bandwidth than the AQ. Larger bandwidth = better transient response, and I, for one, enjoy listening to my music that doesn't shelve off after 50/45 Hz.
To the OP: If you come to pick up your SA tomorrow, I'll meet you at Sundown Audio and I'll bring my test SDC 12 and my SA 12 and let you listen to both of them. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif