Russian - Best
Yugo - almost as nice as the russians
China - Not as good as russians or yugos, but still very nice
Albanian - By far the lowest quality SKS made, but still a very nice reliable gun
This seems to be the opinions of the majority of SKS owners, including myself ( i have all 4)
I would definatly suggest you get a Yugo 59 or 59/66 ( i have one of each and cannot tell any difference between quality of the two, just one has a grenade launcher and one doesnt) if you want cheap, my yugos shoot every bit as well and are made just as good as my russian 55 tula. If you dont mind spending the extra money get a russian because it will be worth more than the yugo later on, or a china made one ONLY if you want hi-cap mags for it (if you want 30 rnds or more find a SKS-D that takes AK mags from the factory) just remember to check the rifle out and clean all the cosmoline off of it before you shoot it (esspecialy if you get a Yugo it will probrably be covered in the crap). I have a VEPR II AK, a SAR-1 and 2 AR-15's and i still enjoy shooting my SKS's as much or even more than any of them, and they are VERY easy to clean and maintain, an all of mine are VERY accurate at 100-200 meters, and i have made a 500 meter shot or two with the Russian one, plus they are really cheap to feed, and to buy.
Enjoy your SKS, one of the best rifles ever created!!!