IL2 Sturmovik

[Evil_Maniac From Mars]

Alright, so being a flight simmer, I'm naturally interested in IL2 Sturmovik. I just had a question for the local simmers who have already bought the game - which packs should I buy? The original IL2, of course, but out of the Forgotten Battles, Forgotten Battles Ace Expansion Pack, Pacific Fighters, Pe-2 add-on, Manchuria and 1946, which ones are best to get?

Thanks in advance.