I want to upgrade. I bought a D3000 and I want a better camera. I want to stay with Nikon because I have Nikon Lens. What is a good upgrade? I dont want the D5000 Is the D200 outdated? I can get a used one for 600 dollars. or should I just get a new D90. There are so many different versions. I am confused. I'd like to stay under 1000.