Coax and cat6 close to the main power trunk
I know there isn't a black and white answer on this one, but I'm going to post the decision I made as the answer (based on everyone's feedback).

It just felt too close to run the coax/cat6 4" from the main power lines.  My handyman was able to cut out a small section of the drywall on the adjacent wall, run the coax/cat6 behind it and feed in to the basement in the next joist bay.  I feel much better about this solution.  Nagging internet issues can be tough to diagnose, so I want to get the best wiring I can up front.