So, been sitting on the sideline on this one so far but with some big sequels coming up (AC:Unity, Halo: MC Collection, Advanced Warfare) that I've played a ton of, I've been thinking of getting a bundle. I'm currently between the AC bundle w/o kinect or the Advanced Warfare bundle. My question is this: I'm not huge on the AW console design (nor is the wife) but 1T HD seems like it might be necessary. I've casually kept up on the XB1 and see more and more of installs requiring 50GB and such. Is a 1T HD built in necessary/helpful? Is using an external HD easy with the XB1?