I've recieved some Amazon gift cards and I'm thinking of buying a boxed version of BOS that's on there. Is it compatible with all of the DLC's? I want to pick up a few collector planes from Steam and I want to make sure I won't have any problems. By the way, I know that Stalingrad was the first offering in the new series. Is it still up to par? It's a good one, right?

You're better off just buying and downloading the game online, as the boxed versions are really old by now, and you'll have to update the game, anyways, before launching it for the first time.

Stalingrad is still good to go, yes, and in fact its autumn and summer maps are receiving a big texture overhaul in the next update.