How many photographers actually find themselves utilizing the full 21MP of the 5Dmkii? Now that I have recently been shooting my first few weddings with the 5D mkII and having experiencing the drawbacks(slower lightroom/PP process time, CF memory space) of huge RAW files, I kinda wonder if I really need the 21MP. When I shot 5D weddings, the biggest picture size I offered and actually sold only twice was 24x36 and the biggest customers request is 16x20. The 12MP did just fine for those size, so I wonder if I should just set smaller raw file. What do you pro's do with the full 21MP?