Is 20GB in an xbox 360 enough for me?

I wanna buy a xbox on craigslist and i saw really good combo package and was wondering if a 20 GB xbox 360 is enough all i plan to do is play games



(like modern warfare2, black ops, fallout 3, Medal Of honor, Gears of war n halo n stuff)



Ill probably only have 12 games , 15 AT MOST. ill also want to put some music NO movies and some demos. You think 20 is enough i thank all of you for your answers :)Is 20GB in an xbox 360 enough for me?
it might be enough for 15 games.Is 20GB in an xbox 360 enough for me?
No 20 will not be enough for 12-15 games, and you want to put some music and Demos.. Maybe 60 GB would be enough, but surely 20 GB Xbox 360 would not be enough space for what you are asking...