Thanks all!

I decided to do some more research after your inputs and came across with the Ritz-Carlton being on MR's PointsSaver list. I think I will just burn 60,000 MR points for two nights there (same point-requirement for 2 nights at the Marriott Singapore) and am sure my family will be treated very well. I think I am putting a fairly good use to those MR points. After AA's departure from MR, I will have a harder time using those MR points from the MVC membership, so I want to burn them as soon as I see good opportunity.

for the Sheraton Tower. I will just keep my * points and use those at the Westin Macau or W Hong Kong during the same trip.