They broke into my truck 2001 F250

So my truck got broke into and all they took were the outdated Panasonic and my wifes iPod classic.

The insurance company is sending me a:
AVIC-S930BT, it looks really cool

http://www.pioneerelectronics.com/PU...on/AVIC-X930BT

What speaker can I add to this head unit using the head power and factory original wiring to compilment the unit. I want to change out my original speakers qty 4, 5x7 speakers. What will work good with this head units power?

Thanks guys.