For SIN what is your budget? Hotels here are very expensive....

The best i'd recommend is Marina Bay Sands, casino is there and the pool on the top overlooking the city and bay.

In the city so many options, expensive but less than marina bay sands:

- Swissotel and Carlton are close to everything
- Novotel Clarke Quay is in the touristy area and sometimes have specials

Send me a PM if you want more info