I own modded D7000 which where my favorite can for years. Just bought a re-cabled 8 wire TWag/TWcu PS500 and I am blown away by how good these are. I was not expecting this kind of depth, clarity and tonality. I dare to say these are the better headphone.
I listen to them both balanced out of audiogd flagship system so they are fed well. Grados will typically sound great out of even a portable source.