Re: ? on audio
Parts alone for the WK will run roughly $300-$500 (depending if you source them yourself or pay a shop full mark up)
going off rough amazon pricing, youre looking about $60 for the harness, $10 for the antenna adapter, $12 for the dash kit and $60 for the steering wheel control module. You'll need the dash bezel from a WK with Nav which will run you about $125 on ebay. Total is about $300 going that route, in just parts, still doesnt include your nav radio.
I can tell you if you came to the shop i used to work at you'd be looking about $200 in labor to install the nav system and steering wheel controls, Back up camera would be about $85 and front camera would be about $75. So ball park that at another $350 in labor alone.
You're at about $625 in parts and labor without even buying a stereo yet.
Keep in mind, ipod adapters, satallite radio all those parts are extra in parts and extra in labor.