I did some investigation and the two 48x models that will will be FREE after rebates are the Cendyne and Kyphermedia.
I was just at Office MAx and the Cendyne is the 48x Lite-On. If you look on the back of the box where is says MODEL # it will be LTR ######. That is the 48x Lite-On.
I am not sure what software comes with the cendyne the box was very sketchy at most on the details.
Who makes the Kyphermedia drive? What software is included?