Not that you're plugging for the SFP community
Fates is right though, you can't miss with WOE or Strike Fighters (although WoV didn't sit very well with me for some reason). I"ve been a big fan of the Ace Combat series too, ever since playing the arcade version, CAP-22, way back in about 94 maybe? I'd personally say go with the SF project as it's almost infinitely plyable and you can tune it to the more arcade style or sim it up, depending on which end of the sim spectrum you find yourself. Plus, most importantly, I think the SF project sims (SFG, WoV, WoE) are the only ones outside of the Ace Combat style games that have a flyable F-23 blackwidow! How can you go wrong?
Also, despite being a bit old and Helicopter sims, Enemy Engaged Apache Vs Havoc and EE Comanche Vs Hokum aren't bad too.