What's King Boxer about? I haven't heard of that one before.
Maybe you've heard of its other title, "Five Fingers of Death". The Onion AV Club ran a really good review a little while ago.
http://www.avclub.com/content/dvds/king_boxer_the_36th_chamber_of
And holy crap. Lau Kar Leung and Gordon Liu can be seen in the recently (last friggin week) released in America Drunken Monkey. This is a relatively recent film even, only a couple of years old. Leung and Liu co-star, and I'll be danged if those middle-aged dudes (Lau Kar Leung is well into his 60's, but sure as hell don't move like he is) can't still bust a move or two. Next-big-thing Wu Jing (the stabby dude from SPL/Killzone) is pretty good in it.

Its excactly like a Hong Kong movie from the 70's but it was made only four years ago, its even got a dodgy (and optional) english dub and subtitles. I was able to rent it at Blockbuster, no going to some niche video store. Its no masterpiece, but its rather enjoyable, lightweight, and refreshingly old fashioned. Give it a shot, why don'tcha?