>Thanks for all the info.I know going with a full size sensor >I will be losing some reach.
That depends on what you mean by "reach". Many people (count me as one of them) equate "reach" to the quantity of pixels that any given subect will cover. In that case, the D800 has greater "reach" than any other FX camera, AND most DX cameras.
The DX format does not automatically increase "reach" - it all depends on your definition and the pixel count