Hi, I'm not exactly familiar with Singapore's currency. I'm gonna post a few links to some parts for ya. These links are to be used solely as a reference. If you could tell me how much this is gonna be in Singapore dollars, I may be able to change a few things to better the build.
That build, changing the gpu to a GTX660 TI, cost roughly 1480-1500. The most expensive thing in Singapore is usally the GPU, its inflated by so much. 400 GPU over there cost 845 over here its ridiculous.