What to buy?

[phoenix]

So. One of these (predictable) posts. The sale is up and tempted by the saved $10 (with which I could buy, for example, an e-book on some campaign or other...) I'm wondering which campaign to get out of the following (from Panzer Campaigns or Modern Campaigns):

Moscow '41
Moscow '42
Budapest
Sicily
Stalingrad
Fulda Gap (from MC)
France 40

The rest (from PC and MC) I either have or I'm not interested in. 

Only one, for now. 

Any advice? I like the big scenarios more than tiny little battles, but prefer balanced scenarios, for either PBEM or hotseat against myself, never against the 'AI'. 

Thanks!