Dear Sir/Madam, I am at present operating with a Nikon d 300. What are my best options for an upgrade. I want a good frame rate for shooting fast moving action (the d 300 is 6fps). I would like camera with pop up flash as it serves me well. I would like to go to higher ISO (at present max is 3200). I like the look of d800 but concerned about dropping back in frame rate. I am not concerned about video on the camera. Would welcome you views.Regards Tayler Strong.