I installed a roll bar fabricated by Ross Murray of Exoticraft in SoCal. It is a beautiful piece, very strong and looks almost factory. It mounts to factory holes in the frame, with the exception of two holes that you must drill out to enlarge them. It just touches the headliner without crushing it, just what I wanted. It is also safely a few inches behind the seat headrest to prevent head contact in the event of collision. Visibility is still pretty good, and plenty of room for luggage.
Ross typicality installs these himself as there is some fabrication work required. He recommends having a fab shop install them, but I'm fairly handy so I did it myself. Here are some pics of the finished product. I'll follow with another post with step by step photos.
IMG_1142 by solomontodd, on Flickr
IMG_1143 by solomontodd, on Flickr
IMG_1147 by solomontodd, on Flickr