From what ive read on the forums, hong kong seems to have a great shabbos situation, however may not be that much to do other wise
Singapore on the otherhand, there isnt much info on the forums, but seems like alot nicer and more stuff to do-but dunno the situation with shabbos.
Regarding phuket-anyone stay in Le meridien khao lak? how was the hotel itself? too far from attractions?