There is a lengthy thread about this, quite up to date as well. Your best bet currently is still MO, closely followed bei either Charles or Kempinski, depending on your taste. The latter is, despite renovations, still a bit dusty and pretentious. I wonder if Amanda will be able to raise standards at MO and work on their hospitality, but they are already leading the market (if you can forgive a few caprices along the way).