The only plane that definately adds something for everyone (EW, MW, LW, Scenario, FSO, AvA) is the Ki-43. The G.55 would give the Regia Aeronautica lovers something that can drop a bomb at last; the He-111 only adds for BoB, unless they will perk the Ju-88 in EW. Beau & 410 don't add anything we don't already have in one fashion or another. Yak-3 adds the least to AH; just another LW uber ride.
So I choose for the Ki-43, even over my beloved Fiat G.55!