I have a 46ES7000 model and just upgraded my wifi to Apple's latest Airport extreme. I now use my o2 router as a modem. However when I tried to change the network settings on the TV it searches for networks under menu > network > network settings and finds a list of servers including Airport Extreme for a split second and then crashes and you have to press the menu button and find network settings and repeat the process again and again. After about 3 attempts it can't find any servers.
As the tv is on the wall I don't particularly want to try and hardwire the router to the tv otherwise I'll have to get the deorators in!