All I can say is don’t get it from Steam if you want the SF Edition. Get it some place else for a bit less, but with Steam I think you are supposed to get the game up to 3 days early…I guess that is ok if you don’t want a hard copy.
Firstly it's hard to be "What a great advantage I get the game a month late and 3 days earlier." I mean after a month delay it will be hard to convince yourself your getting the game early come March 20 something.

I'd like to see this game playable without a cd, I mean every other developer is doing it, why not CA/Sega.

The units will most likely be tossed around, since they arn't on mutliplayer I don't see any method or check CA has to block the eventual possibility that people will hand this stuff out outside of the game. There will probably be a activation code, but those things never last.

I'd say most people are better off just buying it from one of the websites/stores and getting one exclusive unit, and not dealing with the steam hassles.