Install it yourself. That way you won't have someone cutting up your car. To run the speaker wires to the rear, just pull the doorsill on the passenger side, pull the cover off over the wire tray underneath. That's where you can run the wires. You need to run the wires behind the front kick panel....but you'll figure that out. Then pull the rear passenger seat and, from the trunk, you'll see an access hole....run the wire through there. It's really easy. The 6X9 speakers install in the holes in the rear deck. You can buy original metal covers that fit over the rear deck and the speakers will connet to those. You'll have a set up that looks original from the rear window. You do need to pull your A/C ducts to gain the room to wire the wires, get the radio, install new center speakers, etc.
I usually start running the speaker wires from the trunk, then to the front.
If you decide to do it yourself, this forum will answer all your questions.