With the coax cable, just kinda make some lazy "S" shapes under the carpet. I have an unlimited, and ran the cable from the dash to the tailgate on the passenger side. I made lazy "S" shapes under the carpet under the back seat, and have had no issues with my radio. Get a decent mount (I've got the Teraflex, no need to run a ground wire), and decent cable, and you should be good to go.
08 Unlimited Steel Blue
All Sorts of Crap on it
In the space of about 30 seconds, this man was in a car accident, an explosion, lit aflame and then kicked in the balls with more force than a human foot can technically take.
Future terrorists take note: this is your retirement package.