Dear illidonleong:

For the cost, is very depend what type of materials you want for kitchen cabinet. Once you have decided for the materials, then secondly will be cabinet company.

For my case, I choose 3G glass for top units and base units, table top I choose concrete with tiles.

If budget is a concern, you may go for melamine + concrete table top as that is a cheapest option. 

Once you have decided for the materials, can check with few cabinet company for quotation and price comparison.
You can contact Yap, who did my kitchen cabinet, very good follow up and workmanship.

Contact: Yap (018-286 0082), you may tell him you are Steven friend.