Hi Foiks, I may be getting a Nikon D3 soon so I will need more CF cards. I currently have 16gb & 4gb Extreme 3 cards for my D300. However, the cheaper equivalents are from Transcend but I worry about their speed. Does anyone use them? If so, how do they compare with the Sandisks? How many continuous frames can you shoot before you have to stop? Your help would be greatly appreciated.