Honestly if all of your friends are on Live I'd get it an XBone. Especially with the upcoming "games anywhere" thing that allows you to play XBone titles on PC (if you have a decent enough PC) and your XBone with shared progress between both. Then you can have the best of both worlds.

If you don't plan on playing with your buddies often, or don't like the types of games they play, then get a PS4.