I think that you want to use a consumer "toy" software package as a professional design suite. While I have great respect for Real Flight/Phoenix "Toy" simulators etc... they are not serious attempts at providing flight result data for professional use. They might get you into the ball park and section, but never the right row and certainly not the right seat. There is just no instrumentation information available.
Personally, I think that the physics is better in X-Plane... but it is an opinion and that is what it is worth.