The folks over at Groupon have a doorbuster deal today for an Xbox One with Kinect and Forza Motorsports 5 for $329.99. That's a decent savings for the bundle, although if you don't want Kinect there will probably be better deals had closer to Thanksgiving and Christmas. The other caveat with many Groupon deals is that this is a Microsoft Factory reconditioned unit.
If you are still interested, head over to the sale page before they are sold out.