HK is slightly cheaper for electronics. They do not have 5% GST like us.
Which notebook you get depends on your purpose.
If you need light and mobility, get a light notebook 1.2kg - 2.2kg
If you need memory intensive, you may want to get a faster processor e.g. Centrino and higher RAM e.g. single card DDR 512mb.
If you need graphics, you may want to get a separate graphics card (not shared) and high resolution display e.g. SXGA.
This set up may cost S$2,000 to S$3,000.