I have a 2800BH and was looking at the same thing. However, if I'm watching TV outside, I think the speakers that are mounted outside should play too.
Im thinking if I run a HDMI cable from the reciever, to the TV (outside) that should take care of it. Then I just select my reciever to zone 2. I think it would work ? May still have to run a coax for the cable, but maybe not. I Will let you know what I find out.