My obvious upgrade route is to replace (if I do, as opposed to holding off for a while) my nearly 4 yr. old 5D with a 5D2. I'm concerned my 17-40 and 24-105 lenses are not really up to realising the theoretical benefit of the improved sensor, although that would not be my primary reason to upgrade. I think the 50/2.5, 70-200/4 IS and 300/4 IS will be OK. As an alternative, which I can do within the same budget or probably less money, I could get a 7D with a 15-85 (which has had rave reviews) and a 10-22, keeping the other lenses but selling 5D body, 17-40 and 24-105. Main concern is given I print up to A2 how will 7D/15-85 & 10-22 image quality compare to my existing 5D/17-40 &24-105 in terms of a) resolution, b) tonal gradation, c) noise at high ISO. If I had more money I would contemplate the 5D2 and some zeiss ZE lenses, but I haven't , so its not an option. The 7D is attractive for things like spot focussing, sensor cleaning, decent LCD ( I can't even see the histogram in bright sunshine on the 5D), live view, AF micro-adjustment etc. But I don't want to step backwards in image quality. I think main image gain from 5D to 5D2, given same lenses, would be useability of 1600 to 3200. I'm not sure how 7D would compare to 5D, given pixel size is about half.