Of course, reddit does [0]. To match the Xbox One, without the $100 Kinect, a controller, or a nice keyboard / mouse combo it's about $700 [1]. So we can imagine something matching the power of the PS4, including a controller or a nice Keyboard to be around $800-850.

[0] http://www.reddit.com/r/buildapc/comments/1g24s4/the_xbox_on... [1] http://www.reddit.com/r/buildapc/comments/1g24s4/the_xbox_on...