So I probably shouldn't or dont need to replace it at all then? I always thought getting a head unit is alot better than using the stock head unit.
I know that Morel stuff is expensive so of course I would love to get some if I can but other stuff that may be comparable to morel would be ok, I like Hertz so I wouldnt mind getting Hertz speakers again.
What would be the best plan to go about upgrading the audio system?
Just look at the dash... where are you going to physically put it? Assuming you even could manage to integrate te aftermarket piece somehow.
You need something like a JL cleansweep or other similar piece to take the factory line level signal, de-eq it, and then feed that signal to your new amps and speakers.
Seriously, go read that PDF posted earlier. 1500 bucks is not going to get this done unless you know how to do the work yourself, and even then that's a tiny budget.