Where to purchase swiss card

Hello. I'm in the US right now, and flying to Zurich 8/3/11. I'm going to train to murren for 1-2 nights, then on to zermatt where I'll be for several days (4-6) prior to renting a car for a week or so. I've determined that the swiss card is the best for me. Would you agree.
Also, can I buy at the Zurich airport? what is easiest and most cost effective at this point?
thank-you.

Hi,

Yes, the Swiss Card is the best as discussed here. Did you review the Swiss Card page? All online and local prices, shipping details, etc. are listed there. Just fill out your country and number of travelers to get the exact prices of all options. Let me know if any questions remain!