Gran Turismo will be pushing for Game of the Year and has a HUGE following. God of War 3 has its own niche that it appeals to. Dark Reign has potential for buzz also. And you have Final Fantasy due to hit. It is one thing to end up saying Microsoft is going to do well. It is another to throw down a fourth and long dire bomb in hopes you can gloat when no one bothers to reply to this, thinking you scored an awesome point.
On the 360 side, I am awaiting Crackdown 2 and am surprised that you fail to mention Mass Effect 2, which is in the running (the franchise at least) of best RPG this generation.
I also you will be severely disappointed when you find out that Reach fails to move as many consoles as you would think it has. If everything Halo has NOT persuaded large numbers to buy a 360, then Reach isn't either, even if it is the best Halo ever.