I also wouldn't go CableCard. It's my understanding that it's
unidirectional, in that it can tune in, but not send back. This means
you cannot use some of the features your cable company offers like
OnDemand programming. It is also my understanding that the cable card
IS your tuner, you are not using your TV HD tuner but using your
CableCard. Essentially the card is a small cable box, but is very
limited in what it can do (as mentioned in other posts and this one).
I can't see spending the money on digital/HD content but not using the
interactive guide or having access to OnDemand content.