I don't think I would say powerline is better, but it is cheaper. I have a wireless bridge connected to one of my HD/DVRs and it connects to my wireless router. My other units connect directly thru ethernet cables to the router (best option).
The bridge is better than a gaming adapter (in my opinion) in that it can connect to a switch/router at the remote point and then to the wireless router. This way I can add even more device (such as a laptop, xbox, etc.)