Some people swear by shooting only cards that are 8GB in capacity Max. I shoot with 32GB cards, call me a Danger Seeker. Some people shoot only Sandisk media. I personally shoot with the Transcend Class 10 or 400x Media Cards.

Regardless of anyone's rhyme or reason you can grab a Sandisk 8GB SDHC Class 10 for an awesome price over at B&H much cheaper than elsewhere. As for the Transcend 8GB Class 10 (which isn't as fast, but fast enough for video) you can find those running under $12 dollars. Links below.

Sandisk 8GB SDHC Media Cards

Transcend 8 GB Class 10 SDHC