Anyone here got the skinny on CF card speed? Do the higher speed (90MB/s) cards make that much of a difference? Is the difference in writing or just in transferring images to the computer? I need to stock up on some CF cards before we start traveling this summer and Adorama has a sale going on this week. I'm just debating on whether or not to go with the 90MB/s cards or just go with the 60MB/s cards. I don't shoot video or high speed continuous stills, so I'm thinking I won't notice a marginally slower write speed.