i watched ong-bak for the average standard acrobatics and stunts. but for really hard-core top quality choreography, i recommend movies starring these other actors.
1. Donnie Yen (Zen Zi-Dan) - aka 'the fastest man in hongkong' and the greatest one of them all. (combines taekwondo and many forms of wushu)
2. Sho Kosugi (ninjitsu)
3. Yu Ronguang (wushu and taekwondo)
4. Yasuaki Kurata (karate and jujitsu)
5. Kim Won-Jin (taekwondo)
6. Hwang Jang-Lee (taekwondo)
7. Ken Lo (kick-boxing)
8. Hung Yan-yan (wushu)
9. Qian Xiao-Hao and Qian Jia-Le (wushu)