Hi folks, I just picked up a D600 after a long wrenching indecisiveness between it and the D7100. I got it at B&H in a kit with a 32 gig Sandisk 45MB/s card. I was wondering if the D600 can work with two different speed cards. I would like to put a higher-speed card in the second slot and have the camera write RAW data to the faster card while writing JPEGS to the existing card. Is this logical, or does it not make any difference at 45MB/s? Thanks for any info on this.