Though Sandisk is one of those brands you never really have to worry about, Transcend has treated me well. They have baller reviews, are well priced, and quick. The higher speed will definitely benefit you when you're shooting in burst mode and it's a necessity for video.
Transcend also has a lifetime warranty so you just have to go online, register for the RMA, mail it back, and they'll send you a new one. I still, however, prefer to shoot with multiple 8gb cards as opposed to 16 or 32's. I'd rather keep everything spread out in case one dies, I lose one, etc.