Huntress has the newer 800 model and really likes it Diane. Of course mine is just one season older, but came the old blues. On my last trip into Minelab, I requested that the headphones be swapped over to the Yellow Koss. I like them much better than old blues. They stay on my head better and the sound is good quality. I have never used an exceptional quality pair of headphones, so perhaps I do not really know what I am missing, but they are a marked improvement.
As far as OEM coil options, BBS is factory and any other coil options will be on your nickel. They do not come stock with any coil, except BBS. Neither of us ever used one of the original models though. Good luck in your decision.
GH