Been using flight sims for years, going back to that 747 thing for(Commodore 64/Atari 800???)...Sublogic ATP, all the MS series...until FSX.
(figured my old 'puter couldn't handle it).
FSX (fully configured) on a high performance machine. I fly mostly PMDG, RealAir and Carenado sim models. With this level, you get excellent immersion in the sim. Also design and build fictional airports for FSX. Lots of enjoyment from the hobby.
Have Fun!!