hoxlund, you don't need to drill out the cage, it just has 4 phillips head screws in there and that's it.
Btw I just purchased this case with my new build about a month ago and say I love it. With some quieter fans I could make it much better on the ears. But really, if you buy a HAF case, you aren't bothered by some wind noise.
EDIT: Also if you have the Noctua NH-D14 it fits like a charm. You won't be able to put the 240mm fan on top but the cooling is good enough you don't need to.
One of my MSI 560ti Twinfrozr fans went out on me and it still stays plenty cool enough in this case. Very very pleased.