Prince de Galles - Paris
Though I have been a guest at this hotel on a number of occasions over the past 3 years in both regular rooms and suites, I would not consider this property the most luxurious in the Starwood portfolio. The hotel is a little worn, though the location is wonderful, thus my stays at this hotel.
My vote would be for the Bora Bora Nui Resort. The number of points you have available, 250,000ish should be just enough for a week stay.