Zeno
I do not have any firm figures, but I think that they pay a competetive salary for HK. If memory serves me correctly you will be in the same ball park as a Cathay FO with a tasty housing allowance to help things along, and school fees if you have children or are planning to. The operation is regional flying around the Far East including a number of Chinese destinations. I think that the Chinese Govt owns a controlling share in Dragonair, though I may have dreamt that one. It is an Airbus operation, and I think that if you have the hours, command can come quickly.
You will have to live in HK. If you love it, that is fine, but I do know of some that cannot, or could not put up with it. Personaly I would go tomorrow. When I pass the 3000 hour threshold in a month or so I will on the blower to Dragonair.
Sorry if this is a little anecdotal/inaccurate, but I hope it gives you a flavour. Good luck at the interview.