✔ 最佳答案
Budget with $300 - $400 could choose JW Marriott Hotel, quite a good choice as they provide sashimi, lobster and oyster of which you are preferred.
http://www.jwmarriotthk.com/fb_marriottcafe.aspx
Another good choice for this budget is Island Shangri-la Hotel, they provide 7 countries' cuisine (including Japanese) and their dessert are excellent. It is better to choose the one on Island side, the one of Kowloon is a bit worse.
http://www.shangri-la.com/hongkong/island/restaurants/en/index.aspx?ID=1391
If you guys could pay more, then Interconteniental Hotel is perfect. It costs $500+ for each person, but the food they provide is definitely worthy enough. Their lobsters are of bigger size than the one in Marriott, and they provide different kinds of oyster. Besides, the night view of Victoria Harbour they offered is extremely beautiful. One thing should pay attention is, they always get full of reservation, even on the weekdays. You have to make the reservations at least 2 weeks ago.
http://hongkong-ic.dining.intercontinental.com/honic/di02.html
I have tried quite a lot of hotels' buffet dinner, but I would only introduce these three to you. They offered the best food amongst all the 5-star hotels.