You should spend a month in a serviced apartment to get your bearings in HK and hook up with as many real estate agents as possible. It will be tiring but since each person will have different preferences and taste it's essential. Midlevels is popular with most new expats and can't really go wrong there but it's pricey. There's also a new development in Wanchai called the Zenith which is very convenient with clubhouse facilities such as gym, spa, sauna, pool etc. It's in wanchai which used to be a traditional HK residential area but it's now becoming a hip and happening place with the many new developments taking place.