I have been a long term Nikon user, first film and now digital. I have a D80 and have been thinking of upgrading to the D700 for full-frame. However, I now see that the new 5D has a 21.1 megapixel sensor. My question is, will I see a big difference in image quality in 8x10" prints with the 5D? Would it make sense to ditch all of my Nikon gear and switch? Or, will Nikon play catch up? In which case I would just wait.