I think I'm going to pull the trigger on this one.
For those of you thinking of buying... the boxed copy is the same price as the Steam copy and doesn't offer anything you don't get with the Steam version. You can also pay a little more to get the deluxe version on Steam which has another civ but I think I'll pass on that. One really cool thing about buying it on Steam is that they will be donating some of the proceeds to a charity and you can choose which charity you want yours to go to.
EDIT: Erf... just bought but had no option to choose a charity...
For those of you thinking of buying... the boxed copy is the same price as the Steam copy and doesn't offer anything you don't get with the Steam version. You can also pay a little more to get the deluxe version on Steam which has another civ but I think I'll pass on that. One really cool thing about buying it on Steam is that they will be donating some of the proceeds to a charity and you can choose which charity you want yours to go to.
EDIT: Erf... just bought but had no option to choose a charity...