Lived in Sai Kung until recently. One of the best places to live unless you need to commute south. I worked in Tai Po and the commute by car was easy and even enjoyable. If you don't want to own a car then the earlier post suggesting to take taxi to University station then MTR (was KCR) is the best idea. Although you have the taxi cost it will be a lot cheaper than owning a car but no doubt car will be more convenient