Currently I have two SSD drives in my cMP. One is for my applications. One is for my scratch drive (which also houses my Lightroom catalog data). These are older SSD drives and have read / write of 150-250MBs so I'm tinkering with the idea of getting a PCIe Card and 1TB Apple SSD drive. What is the ideal way to setup Photoshop and Lightroom with these new drives? Should it house both the media and the scratch drives since it is so fast?