Why bother getting new pieces of equipment when there is no knowledge of what you need ?
Good knowledge + ok equipment --> decently nice results
Inadequate knowledge + excellent equipment --> probably not so nice results
And its pointless trying to advice on what to get as each individual's needs are different. How to use the tool simply depends on how comfortable the user is on using it.
My 2c worth - save the $$, just go and eat more food there. The food in HK is very nice
1 piece of advice, if you are going up the peak with a tripod, please note that there may not be space to deploy the tripod, and a lighter tripod will probably be shifted by the strong winds there. It may require a bit of additional weighting to stablise the tripod.
Happy holiday !