Hi there. I'm thinking of getting a small home cinema setup, 5.1 with 2 rear speakers. I really don't want cables running across the living room to behind the sofa though, there's no way that I can hide them without going a very long way around. Does anyone have experience with any systems that have the two rear speakers connected wirelessly? How is this setup? Can you recommend any specific systems? Is there any lag to get the sound to the back speakers at all compared to if they were wired?