I arrived rather late to the party that is CM. Bought BN two years ago. Was thoroughly blown away to the point I would play the Normandy Campaign for breakfast, lunch and dinner. Didn't feel the need to buy another game.
Until Red Thunder.
If you base your investment on wins per dollar, you may be disappointed. I have yet to beat the AI in either QB or single scenario mode. And yet, I've gotten my money's worth ...and more. Damn you, AI. Thank you, BFC.
My $00.02.