Hi there Adam,
I am an expat in Singapore and rent a condo (condominium = apartment with lots of facilities within the area) here close to the Central Business District. Condos are very popular amongst expats. I can say that the closer your property is to the CBD the more expensive it is. But anyway the location is very important. Maybe it helps you first having a look on the local property sites to check the different opportunities: http://www.iproperty.com.sg is one of the best ones. They have property (houses, apartments, condos) for rental and sale. I found my condo there as well.
You also can see there the iCondo Directory:
This tool can helps you to check different condos by their name. You find there fotos and reviews!!