I currently have a simple network - 1 router and 1 extender. I know that no one likes extenders! I will be upgrading things. Ethernet connections are out of the question, so I intend to use powerline adapters. Devices will be a MBP (as a Plex server), 3 Samsung TVs (as Plex clients) and various iOS devices. What I'd really like is a bit of software that can test the speed between the MBP and the TVs. The speed between the MBP and the router it connects to can be tested, and there are iOS apps that test the same, but nothing that I have found that can test the speed right through the network. Any ideas? I don't mind paying for software.