Would it be crazy loud if I just ran straight pipes out the back from the headers?

I personally love headers and straight pipes - as long as the pipes go all the way back - shorter pipes sound dumb, especially when "dumped" under the car somewhere. Being an automatic though, would sound better with some type of mufflers (cheap glasspacks or something) - if it was a stick, then straight pipes all the way. Not too hard to keep it quiet if you know how to use your right foot.