I'm using 2x Lexar Platinum II 32GB cards, class 6.
They work well with both stills and HD video. Each card will hold just over 900 RAW shots or 2200 shots at Fine JPEG. For me I opted for a cheaper speed/class for more storage. I bought them from Adorama a few months back, now you can get the class 10 cards for the same price I paid for the class 6. These Lexars aren't as fast as the Sandisk cards but are considerably cheaper and do a decent job.