PS1 is the industry standard for simulation, but is also mighty expensive. FS2K is a game (not looked at FS2002 or the nes 2004 version), Fly! has good reality in as much as setting instrumentation, etc but is clumsy in terms of having to use the mouse all the time. Perhaps do a search on the net re. sims in Aussie - there are about half a dozen folk who have built full motion sims like
here or
here