One of the primary reasons why people go overseas and live there for quite a time is because of education. Most of the world's top universities are also located in the world's biggest and richest cities, which may account for the thousands, if not millions, of people going to these metropolitan areas to study.
If you decide to go to Hong Kong for your own education, then you won't be disappointed. Hong Kong has some of the world's most well-known educational institutions, may it be undergraduate, graduate, or professional education. In the Asian region, certain rankings also place Hong Kong universities at the top of their lists, beating out some of the revered Japanese universities.
The international city has at least 7 universities and several other tertiary institutions. Considering the small size of Hong Kong, you will see that tertiary education is such an integral part of the educational system. The cost of undergraduate programs are relatively cheap, around HK$40000-50000, because education is greatly subsidized by the Hong Kong government. With foreigners coming in from the US, UK, Australia, Taiwan, Italy, and Singapore, studying here becomes a truly international experience.
If we are going to talk exclusively about university rankings, then the top university in Hong Kong would be the University of Hong Kong, which also happens to be the city's oldest. In 2009, it was ranked as 24th in the 2009 THES-SQ World University Rankings, while it was also awarded in the same year as the top university in the Asian University Rankings by Quacquarelli Symbols. You might want to do a little more background about the university by visiting its website.
The other universities in Hong Kong are the Chinese University of Hong Kong, City University of Hong Kong, Hong Kong Baptist University, the Hong Kong Polytechnic University, the Hong Kong University of Science and Technology, and Lingnan University. For postgraduate education in the city, here's an excellent website that can help you start with yout search.