I need to re-think my idea. I have some photos that I took at OpSail 2012 that I'd like to make big for that room but maybe several at smaller would look better.
So, let's approach this from the other direction: I have not made any big prints from my D3x; I have not yet taken any photos that I deem worthy of a large print. from my D3s, I have several that are worthy, but I've not yet printed them at the at 40 x 60 and maybe this is not wise idea; more at smaller will look better. My idea was to have a print over the model case, but I don't know if that is wise.
Will my D3s print a high quality 20 x 30 print? Yes, it will. How much larger will the D3x print?