The storage issue has been debated to death. Wake me when a game can't be reproduced on dvd9.
Well the first step would be acknowledging that you don't even get DVD9 on the Xbox360 - you only have 7GB and you can check the space used by 1st/2nd gen Xbox360 games right now to extrapolate (or previous platforms if you dare).
But that's neither here nor there - people have agreed to disagree until further notice.