Hey all, I want to get 2 sets of wireless headphones: 1. For my guitar and amp upstairs, for late night exploits of a rocking nature. 2. For my HTPC/cinema system in the living room. Some Halo will be played and listening to music/films late at night. Has anyone used wireless headphones on an amp before? I have read loads of great thigs about Sennheiser, they pretty much speak for themselves. Any recommendations from existing users would be very helpfull guys. Thanks in advance.