highlander

I'm a first timer. I was thinking about doin 2x 12's in my 02 Highlander. I almost have my Bachelors in EE so I think I can handle it, my biggest mistake will be being too confident and messing up something somehow. People say 12's can get lower but might introduce some delay in the output...

So I am completely new at all of this car audio stuff. I have a 2003 Toyota Highlander with a Pioneer AVIC-Z1 head unit. Also, the speakers in my car are JBL, if that matters. I'm interested in buying some subs and an amp for the back of my car. I've heard Alpine Type-R's are good? I listen...