I think that 8gig is a safe number to max out at due to the fact that maybe I just don't shoot enough but the 200 or so raw images it can capture lasts me about 3 to 4 days of casual shooting. 16gig would be nice but I just don't trust that the card will not fail on me even though it has never happened. I have an 8 gig, three 2gig, and one 4gig. I like using the smaller cards often because it forces me to not rely on burst mode so much to get the shot I want. Remember the old film days? 24 shots is what you got before you had to change rolls and switching cf cards is not even close to as time consuming as film. I dunno maybe we just been so spoiled with all these huge cards out now, makes for luxury and lazy. Heck I might as well go out and buy a 32gig card and never have to worry about switching cards while I am shooting!