Performance Auto and Sound puts out a good magazine. The magazine itself is huge (generally around 300 pages or so) and has a decent amount of audio related articles and reviews. The subscription price is also insane cheap compared to other magazines, especially if you live in Canada.
i agree w/ PAS that is my favorite one Dub is more about the wheels and vehicle but they do usually have some pretty nice systems seeing as that everybody in there is rich.
Depends on what you're looking for in a magazine. If you're looking for bling-bling installations and a bunch of tech advice that you could get right here on our forum, then all the magazines have something to offer you.
If you're looking for equipment reviews, CA&E has gone down the tube. Eric Holdaway hasn't really said anything bad about a product in years, and he sugarcoats EVERYTHING.