I have been looking into purchasing a flight sim and Realflight seems to be the best choice... opinions/options?

I want to use the software to practice IMAC sequences, 3D flying, etc. Is this the best software package for this application?

I have a Futaba 9CAP radio, will it interface with the new interlink USB controller?

Do I need to have the Add-ons to use custom planes designed by other people (for example, someone modifies the Cap in Add-Ons one, do I need Add-Ons one to use it)?

thanks in advance for any help!

-Chris