I'm primarily a landscape photographer and prefer the "big vista" type of landscapes that Ansel Adams was famous for. That being said, I want to move from film to digital. I currently use a Contax RTS-III system to do most of my work, so that leaves me in the position of not having an existing set of lenses for any current DSLR system and frees me to choose either Nikon or Canon. There seems to be two primary differences between the D3 and the 5DII that would affect my work: pixel resolution and build quality. (I don't care about video, so that feature of the Canon is not relevant.) The 5DII is 21MP and the D3 is 12MP. For landscape work where my typical print is either 8"x10" or 16"x20", how much difference will 9 additional MP of resolution make? If this is a significant factor, then this will probably sway me towards the 5DII (the EOS 1DS mark III is out of my price range). The D3 is Nikon's top-of-the-line "pro" DSLR. Is its build quality significantly better than an "enthusiast" DSLR like the 5DII? I'll be carrying whatever I buy around in a rucksack in sometimes dusty conditions--will a pro model make much of a difference here?