My wife is not a big shopper but she did do the night safari and liked it.
She loved the food also!
She went to the Raffles but she does not drink so no Sling for her...

We will also combine SIN with another place and are thinking KUL because it is so close but CGK and BKK are options also.
I wouldn't mind going to Siem Reap or Bandar Seri Begawan though also....
We shall see...
Let us know what you decide on!!