I ultimately went with the PS4 because I like the interface, controller, and exclusives more. In addition, there is greater indie support on the PS4, and I'm particularly fond of indie titles. This is not to say the X1 isn't a solid console. With exclusives including Gears, Halo, Crackdown, its ability to act as an entertainment hub, and Games with Gold, the X1 is most definitely a good choice too. Neither console is objectively better, so it ultimately comes down to personal preference. Seeing how you already have a PS4, I would not recommend picking up an X1 unless the entertainment hub feature and exclusives heavily appeal to you. If these do appeal to you, I say go for it. Either way, I hope you are happy with your decision.