The first external P-CAV 16x DVD writer in the world, GSA-5163D is also coming. With some luck, I might be able to post some initial test results. Don’t ask me how I might be able to do that.
GSA-5163D is just an external model of GSA-4163B which supports 8x DVD+RW, 6x DVD-RW, 16x DVD+R P-CAV, 16x DVD-R P-CAV, 4x DVD+R SL, and so on. I’m not sure whether GSA-5160D and GSA-5163D also have both IEEE 1394 and USB 2.0 connectors like GSA-5120D, but we’ll know it pretty soon.