hey there, i shuttle between vancouver and hk quite frequently, and am a fellow nikon fan. give me a shout when u're in town and i can give u some shopping pointers. but Wing Shing is a good place to start (and probably finish as well) on the kowloon side.
check out some of my vancouver photos at
http://www.wereamshallbe.com/all.html
do u have a photo gallery online ?