If money is the object, then do rethink it... with a FF cam, you need good lenses else you will have problems with the edges, be it sharpness or vignetting.
Thus, I'd reccomend that you stick to the D300 unless you have a good line of lenses already which can be used on a FF.
Check out lsisaxon's posts...
D3 + 85/1.4 and 24-85/2.8-4 @85mm vs D300 + 17-55/2.8DX @55mm
D3 + 28/1.4 and 24-85/2.8-4 @28mm vs D300 + 17-55/2.8DX @17mm
Here are the differences of a Fx vs a Dx with different lenses. Make sure you have GOOD lenses if you are going to the Fx direction.
Thus, I'd reccomend that you stick to the D300 unless you have a good line of lenses already which can be used on a FF.
Check out lsisaxon's posts...
D3 + 85/1.4 and 24-85/2.8-4 @85mm vs D300 + 17-55/2.8DX @55mm
D3 + 28/1.4 and 24-85/2.8-4 @28mm vs D300 + 17-55/2.8DX @17mm
Here are the differences of a Fx vs a Dx with different lenses. Make sure you have GOOD lenses if you are going to the Fx direction.