I'm embarrassed to say that I've never seen Aurifil thread in stores. Of course that doesn't mean it's not out there. This thread has caused me to want ot go LQS-ping to look at the threads available locally.
I'm still trying to use up all of the threads I had purchased to go to the sewing school in Huntsville. I had bought every thread recommended on the shopping list. I use mostly neutrals for piecing -- creams, beiges, and grays.