Originally Posted by Unterwegs
The airport is close to the city (Taxi less than 10 USD - 15-30 min - there is also a subway system which should be even faster).
The subway (MRT) is cheap and convenient, but it will take quite a bit longer than a taxi to get into town. It's not an express train and you have to change trains at least once.
Having said that, I would also suggest that the OP take SQ, and enjoy a visit to Singapore.