It's all a matter of opinion with CableCard.
CableCard allows you to just run the one coaxial cable from your wall, directly to the TV, and receive ALL the cable channels that you are subscribed for. Contact the cable company (again) and ask them what the cost is to rent a HD cable tuner and then how much it costs to rent a CableCard. Typically it is 10 bucks for the box, 2 bucks for the card.
That's about $100.00 savings a year.
But, you lose the ability for pay-per-view as well, and more importantly, the electronic programming guide that shows you what's on all 300 channels.
They do (typically) include the ability to get 'TV Guide Onscreen' which, from what I have heard, is a fairly poor substitute for the cable company's EPG.
But, you eliminate the external box. If this is a PRIMARY television though, consideration needs to be given for a digital video recorder. A DVR built into a cable box is awesome. Everyone who EVER gets one I have not heard complain. They use it and keep using it! But, you have to have an external HD cable box w/DVR to get the maximum potential from this service.
IMO - If this is a primary viewer - then 32" is way to small. A 42" plasma is about the smallest I would ever recommend.