as far as rep goes, there is really nothing great in HK, Shenzhen or Macau.
I'd recommend you to goto Venetian....walk around. People in casion of course usually wear alot of good watch. during my 2 days visit, i have seen 2 Daytonas and many rolexes. For Dinner I'd recommend Fernando at Hac Sa Beach (+853) 28 882 264 . The food there is very nice. I saw two panerais and a vintgae platic rolex sub and a TT sub in this resturant on one night, when i was there 2-3 weeks ago.