Hi Mike...If you opt to install a sun-roof, O.E.M. is out of the question.unless you ask Landrover and they say you can, for about $3,000.00 each? However, a properly installed hi-tech roof migh be your answer if owning a "stock" vehicle is not your goal. A power aftermarket sunroof might set you back $650.00 to $1,000.00 or more, whereas a manual unit (that is a QUALITY unit), will let the light in your rig, and add a touch of your own personality, for a much more reasonable amount. Are you going to keep your L.R.? if so, do what pleases YOU. You are the guy who will live with the choice. You could be really different, and install one of those humongus ones...and let the sky be your guide! Let us all know what you decide,...you might start a trend!