tough call, I think the first Polish ak copies were the best; it is stated they are the most like the origional russian ak's. I likey the bulgarian ones as well; and any other polish version to boot. Then you got the chinese with the milled receivers, and you have the Israeli Galil types, I like those a lot as well.
A lot of peeps like the yugo underfolders; i like everything about them, except for the actual under folder, if you can find one version with the side folder, that is better, in my mind.
if you want one that is closest to origional russian style and parts, and want it with ALL NEW PARTS, get a Saiga, and convert away, with the trigger and furniture parts; all the rest will be origional russian, and in my mind, just as good as the origional, if not better.