Anyone have any favorite XQD card for their D500 or other camera that does 4k video? What card write speed is best for 4K video? I know the d500 has it's huge buffer but I want a card to keep up fairly well. Right now I've been only using a SD card for images and some testing of the HD video. But I'm going to want to test 4K video which I don't know if you can do to the SD card for any length of time.