L.H.
hi Myra,
I lived in Hong Kong for almost 5 years before I had kids. I tutored a bunch of expat kids there that went to various schools -- HKIS (HK international school), CIS (Canadian international school), and Chinese International School. All the schools were great...just expensive.
Don't worry about the language thing, most everyone speaks english. plus, the signs are pretty good there. Cab drivers are a bit hard to understand at times, but most of them know the major streets, landmarks, and hotels.
I'm not sure about preschools (there are a bunch around but mainly in Chinese settings), fitness centers are mainly in Central and Kowloon. Expats usually live in the Central area (where there is a huge escalator that you can use to get to local shops and downtown Hong Kong) or in the outlying island like Discovery Bay (but it takes 40 minutes by boat to get to HK island). Where you want to live will depend on how close your husband wants to be to work, how much your husband's housing stipend will be, if you will own a car, and if you want a lot of land to "roam".
I loved it there and all my friends from the US that moved there to work all loved the vibrancy of the area. PM me if you want know more.
L.