I'm learning the Alero now, my last car was a Galant and not too audio friendly. But this car seems fun and if you need any audio stuff, PM me as I can probably get you just about anything.
But i do have a question for those who've taken apart your Aleros throughly....does anyone have a pic tutorial of taking off the headliner? I need to dynamat it too.
whats your current system? Do you already have subs in there or looking to do them? If you live in Canada i would suggest looking into Kaption Audio. Great company that i can't find in the states.