and welcome to Nikonians. For my D300 and D300s bodies, I've been using 16GB SanDisk Extreme Compact Flash cards (60MB/s). They're serving me well on those cameras, even though such cards have much more capacity than you specify.
I've also used another photographer's Lexar 2GB and 4GB cards when I shoot second camera at weddings; my apologies. Off the top of my head, I don't know the write speed of those cards, but those cards have worked well, too, for my uses.