Originally Posted by
GPreddy
Interesting plan...
While I don't want to discourage you, I want to make sure you understand the process of getting a simulator certified by the FAA in order to log hours. First to answer your question: both X Plane 8 and 9 are very realistic and use almost identical flight modeling algorithms (Blade-Element Theory) to simulate aircraft behavior. The difference is mostly just the graphics and the way they are presented.
I also would like to point out the requirements for building a certifiable FTD. In order to get a certification for a simulator, you either need to have bought the console/sim from a company such as Precision Flight Controls, or have built an EXTREMELY high fidelity cockpit. And that's only a small, single engine aircraft which I am referring to. For a larger aircraft, such as the A320 you mentioned, you would need to have a company such as Flight Deck Solutions produce it for you. Even if you were to build an A320 cockpit and get it certified, you would not be able to log time in it until you had the necessary licenses to be operating or training on an A320 in real life.
In short, the A320 would be a fun cockpit to have and to fly, but probably not economical nor realistic to get certified.
Steve