Hard enough to justify buying the 20D when you're not making serious money from it. I've made some "word-of-mouth" money from mine but to drop 4K (or so) for another camera would be hard to justify for me (and, I assume, a significant amount of other people). And, for 20D owners, the "S" lenses won't work, I think. The 20D already does as well/better than the typical 35mm film camera in ability to print. In my day, getting a nice crisp 11 x 14 from film was about the best you could hope for. 11 x 14 from a 20D is a breeze. So, unles one is shooting posters (LOL), why the race to have the biggest megapixels? Just to put the medium formats out of business? I guess in 10 years, something producing only 50 megapixels will be considered a "snapshot" camera. Or maybe it will be the next "throwaway" camera you pick up at Walmart in a hurry.