Hello guys, I'm thinking of upgrading my camera and want something that does great video (D800 is superb as I've seen so far) as addition to full frame etc. I've seen results of D800 and the camera is amazing but how about the D610? What are the real differences etc., please? I have D90 at the moment so if I invest in a new body I want something good that will last me a long time. Or, when D800 is going to be updated, worth waiting?