My last Vortech question... How many psi?

Honestly, I've owned both. I started out w/ the S-trim, and it was nice and loud. After about 6 months, it started to drive me nuts. I ended up buying an SQ and couldn't be happier. You still know it's there, but you can actually have a converstaion in the car now.

If I were to do it all over again, and the car was a DD, then I'd go SQ from the start.