Definitely the best version
I've seen all of the other various versions of The Return of the Condor Heroes, and I must say that this one is definitely the best version.
Andy Lau does an awesome job portraying the psychologically complex character of Yang Guo, and although this series deviates a bit from the book, it does so to keep the entertainment value up. Idy Chan's Xiaolongnu is a bit cold, but then again, that's how the character is supposed to be. So many memorable characters and perfect performances. And the main and sub themes sung by by Teresa Cheung (Tak Lan) are spectacular!
Also, the number of one-liners and the amount of creative trash-talk between the characters is notable.
Gotta love Jinyong/Louis Cha.