Keep in mind that real flight basic has very limited functionality and expandability compared to almost any other sim.

No Additional Aircraft and "Adjustable Parameters - Wind only" that is even less than FMS!

There are quite a few sims out there that people swear by; Aerofly, FS-One, Phoenix, Reflex, Clearview and even FMS have a strong following.
One could easily argue that FMS is the most popular RC flight sim in the world albeit not the best (but you can't beat free).