I agree with what Katherine said regarding agents pushing Central/Sheung Wan over other locations. I insisted on seeing other locations too, and as an example, if it helps, for your requirements the agents I am looking at would quote something around 10-12k in North Point/CWB and even Admiralty. This is supposed to be "all inclusive" (utilities, free water and tea/coffee, free internet, 24 hours access). Hope it helps.