The D700 can write 41.9MB/s Raw or 33.3MB/s Jpeg to a 1000X 32GB card even though the card is rated at 150MB/s. It will write at about half that speed to a 45MB/s card. I have never had a problem with Sandisk mid or high end cards. Lexar and Hoodman also have excellent reputations for building reliable cards. Good Luck and Enjoy your Nikons!