Really? The K7 is smaller and lighter than both those Nikon bodies. It also has fantastic ergonomics.
Oh, I was totally wrong! Sorry for this. I had the K1 in mind when looking at the images. The K1 is quite heavy and bulky for my personal preferences but I would love to have one day a Pentax fullframe DSLR to use my 2 Pentax lenses on it. Adapters are not always a joy to use. Sorry for this confusion.