I just received my D800 and see I can shoot in TIFF format now instead of just RAW or JPEG. I'm really enjoying shooting in TIFF. I like to open my files directly into PS and work that way. With RAW I have to open them in a Nikon software I am totally unfamiliar with, then usually just end up wanting to open them in PS to work on them but can't. What is the real advantage of RAW files? Especially vs. TIFF. I find that on my card the TIFF files actually take up more space then RAW. This doesn't make sense to me. Someone help educate me please! Thanks!