25 for you and 27 for your wife

If you go on 27 you will likely sleep for a full 8 hrs and be up all night in HKG, whereas on the 25 you will be more likely to limit sleep and be tired at HKG bed time (assuming you want to change to local time). Your wife though will struggle to stay up in HKG after the 25 if she really hasnt slept but the 27 gets in late enough to have dinner and go to bed.