People seem to be low on the Metropole but I think it's one of the best non-resort properties in Asia. Club level is a must, and the suites in the modern wing are fantastic. Hermes toiletries are better than over-hyped Aesop. The hotel also makes the best french pastry in SE Asia in my humble view, so try the croissants.
We found FS Nam Hai to be pretty awful, and wished we had just done more nights at Amanoi. Amanoi is superb as many have commented, and close to best in Aman chain.