Depending on what you're going to use it for, I would recommend just sticking with the XBox Kinect and either of the major other options: OpenKinect (http://openkinect.org/) or OpenNI (http://www.openni.org/)

kinect is highly discounted by most retailers around the year. Though the xbox kinect sells for 149, many places sell it for 99. So you can wait for a few months and hopefully this will get cheaper too