I don't know how to answer it :) There's a lot of code in the world. I can help answer questions on some of it, but I have no idea what's most promising.
I upvoted you because I was happy to see the list, and I'd be interested in other people's answers.
Well, probably I should ask another question, addressed to the different implementations' authors: "Why do you started to write your own implementation instead of making efforts to improve Anarki?" :)
