I believe I heard somewhere that with FSX, one can have nav/comm audio (the sim's ATC and/or your mic and online mics of others) in a headset, and all other audio in the speakers... I can only assume this involves dual sound cards, or...?
And what about FS9? This can't be done with FS9, regardless of hardware, can it?
Still haven't decided yet about FSX, but if this capability exists with FSX but not FS9, I want it.
Seems a silly reason to upgrade to FSX, but that's me...

Once the simpit is done I want engines, environment, etc pumping out of the 5.1 speakers but I'd like to wear a headset with only nav/comm feeding to that... like in real life.