Blinkz,
Not too sure about that. For GA these days, electret is the way to go.
As you move up the tree to airliners, I'm not sure, as Sennheiser (for example) make condenser and electret versions of their airline style headsets. You never see airline pilots using Bose X headsets. However, realistically, if your commercial aspirations stop at King Airs or Citations, etc., you need to check. Anyway, you could always part exchange the Bose or sell it when you need to change.
Maybe one of the pros on pprune can tell you more, but a reputable dealer (on either side of the Atlantic!) will certainly point you in the right direction.