I mentioned the D70 along with the D200 since I use both cameras. Certainly, the D200 (or perhaps D80 Nikon with which I am not personally familiar) would be a better choice.  I don't argue brands since I know Canon, Oly, Nikon and a few others make  very capable cameras.

Please keep in mind what Onslow said about the camera being only the first expense!  I have added tripod, monopod, several lenses, flash gun, etc.   You can add on as long as you have just enough cash left to put food on the table! : )    There are real accessories you will need and though generally less expense than the camera(some lenses may be more!) you will need to have those items sometime down the line.                Tom.

Starting off, you can also consider other brands of lenses such as Sigma for the camera, depending on the camera chosen.  The top line lenses from Sigma do a credible job.