Reading this thread pushed me over the brink -- finally bought Gold Pack (IL-2 plus Forgotten Battles plus Expansion Pack). After only a day or two with it, have to agree it is really great. Good companion to Aces High.
ILFBEP has gorgeous exterior views, precise wide ranging interior views among the most realistic anywhere, stunning graphics, tough gunnery (complete with streams of shells behind guns as they are fired), and optional big doses of realistic settings.
However, haven't gotten on line yet with Gold Pack because of some sort of incompatibility with my server. And it seems to exit clumsily, sometimes requiring a reboot.
Will take me awhile to become moderately competitive with Gold Pack. Especially without icons and supplemented with exterior views, Gold Pack is extremely immersive and challenging.
IL-2 Forgotten Battles Gold Pack joins the immortal basically offline sims like Yeager, Falcon, Jane's USNF '97, and Jane's USAF.