A tinbasher! smile Sparky here.

Put this behind your TV location at 5' or so to center. Your mount can go just over or under it (usually under so your TV can tilt forward freely and not run into cables.) You can get multiple gang versions if you want to plate your HDMI and data seperately. Pretty flexible. We often install brush plates and pass the cable through -bypassing any connection and future proofing. Pigtail power off a receptacle below ideally.

https://www.amazon.com/Arlington-TVBU505-1-Recessed-Outlet-2-Gang/dp/B003E48COU

You can put one at your gear\rack location as well and free air the low voltage in wall as long as the cables are in wall rated. Don't pull an extension cord into a wall. If you have an existing receptacle below you can add a drywall mount low voltage ring and leave your receptacle below as is.

http://www.homedepot.com/p/1-Gang-Non-Metallic-Low-Voltage-Old-Work-Bracket-SC100RR/100160916

Last edited by Serenity_Now; 02/09/17 10:38 AM.