I currently have 2 dish 300 (with dual lnbs) 2 sw-21's hooked up to 2 receivers. In order to add an 3rd dish for hi - def (61.5), what is the appropriate switch combo? I was thinking I could add a sw-42 to combine the 119 - 110 dishes and then combine those outputs (using the sw-21'1) with the 61.5 dish for my 2 receivers. Does this sound feasable or do I have to bite the bullet and get a sw-64? THANKS! Any Tour De France in hi-def out there?