I'm doing some research on a related issue at the moment,
AFAIK Lotus do not have a rep in HK, they're certainly not among the top 36 sellers, this may be a problem if you want an Elise. Emmisions are broadly similar to EU at the moment.
Taxes on a new vehicle are: (HK$)
1st 150,000 - 35%
Next 150,000 - 65%
Next 200,000 - 85%
All above this - 100%
Cheers