Is your Sky contract anywhere near being due up i.e. are they pestering you? Last time I was offered a free Sky multiroom box which means you can watch seperate channels in different rooms.
I'm sure there will be more technical solutions along shortly, but Sky do seem to be quite keen to cut a deal, so might be worth exploring. I ended up with a better set-up, paying less - and I'm the sort that that it never normally happens to.