digging this up again (as the difference in channel change is annoying me on some of the cards in the system).
So as it certainly seems there is no way to have 1 card always view but only ever capture as a last resort. (all the combos i've tried seems not).
However it seems sort of a bug to me. The check box to use the card or not for viewing has no effect on anthing

.
Ie if i have a Card set as lowest priority BUT to record and to view TV, and all other cards "checked" to record (not view) one would assume as TV starts that viewing should occur on the viewing "checked" card, instead it starts on the highest piroity card.
If this feature worked you could leave the card that one wants to view TV on, 'checked' for record and view, but at lowest prioirty, as such when a scheduled recording occurs any other card with highest prioirty and recording "checked" will be used (i fell this should even apply if u are currently live viewing the channel scheduled before the capture starts, still leaving this 'viewing' card for channel surfing until there is no option but to use it for recording)
In the above instance, if viewing was required, all other cards should be ignored (as the viewing is 'unchecked') and the card with viewing 'checked' should be used.
Does this sound correct? If so does anyone know if a bug report has been logged for this.