I've just found another DVD of Kung Fu Hustle here Being the R3 - its uncut (?) and has a lot of nice extras (many subbed in English including a commentary for the film!)
So basically it's the original R3 but with the extras from the R1.
There's also a new japanese superbit edition available, but you'd have to sell your house to buy it (it's on the expensive side).
I used to be "the man who loves the movies you hate".
Now I'm just "that weird french guy with a cat avatar who comes to BnB once a year for no reason and then disappears again".