all I have to say is...Ew Lock-On.... and EW modern air combat, can't recall ever playing a modern day combat sim that left a decent standing impression for me. And there is quite the selection out there, one thing I would say maybe to would be a modern helicopter sim, but even then some of those got old after the 3rd mission, ID, saftey off, target, release and watch boom..rinse and repeat. Im all about the up close and personal aspect of air combat.
Korea I probably wouldn't mind, atleast they had prop driven planes to dogfight in and guns only jets, then again same thing, have yet to play a korea online sim that i liked and left a good impression.