This is gonna be a hard one for me since there are so many great Hong Kong Blu-rays, but here's my list of ones that are extremely rewatchable and are pretty good blu-rays (and for the older films - better quality than their DVD versions at least):
- The Accidental Spy
- Armour of God 2
- Detective Dee
- Farewell My Concubine (China release)
- Forbidden City Cop (Stephen Chow)
- The Legend of Wisely (great quality blu-ray too)
- The Love Eterne (old Shaw Bros musical)
- Naked Weapon (for Maggie Q fans)
- Police Story 3 (Super Cop)
- Shadowless Sword (Taiwan release of Korean film)
- The Storm Riders (HK release is 100 times better than USA blu-ray version)
- Wu Xia (awesome Donnie Yen film)