I'm considering purchasing the Yamaha RX A3020 to supply two rooms. I would like to buy a set or wireless headphones that would not eliminate the sound from the TV when in use. Something that would allow me to crank the volume a bit on the headphones but keep the speakers lower. I was looking at the MDRD S6500 - it has optical but I dont know if 1) the Yamaha has optical out and 2) if it would do what I want. I was looking at the Sennheiser S170 but I was told those would either plug into the headphone jack and eliminate the speaker sound, or, plug into preamp with a latency problem. Anyone know of anything I can use to accomplish what I want?