I had a 1954 Russian in good condition with all matching serial numbers. I loved that thing. It was accurate, reliable, and just plain out fun. I had to sell it to pay utilities. Regretted it the moment I did it. I even got ripped off. Still hold out hope that I will find another one in that condition someday, because I would love to have another one, but who knows. It was well built, and I liked the chromed bore. I can't remember ever shooting it on paper, although I imagine I must have. I just know it was never much of a problem to hit anything I wanted to shoot out to 200 yards or so. I shot the heck out of a five gallon bucket from the cross-legged sitting position at what I later ranged at 280 yards, if that gives you any idea how accurate it was.
My grandpa has a Chinese rifle. It is still solid, but didn't strike me as well built as my Russian. I know I have never shot it at paper, but I also know it is minute of tie plate at 100 yards, offhand.
My bro has a Norinco carbine. Cute little thing. Handy and lightweight, accurate enough for his uses, it is like the rest of em in that it is 100% reliable and about as delicate as an anvil.
My current SKS is a Yugo with TechSights. The TechSights are awesome. I wish I had them on the Russian. The Yugo is definately the heaviest. It is a beefy rifle. Even without the chromed bore, I get the impression it could survive the end of the world. Humans could nuke the planet nearly to oblivion, kill every organism on earth, and turn its surface into sulfurous acidic smoke, dust, embers, and ash, and that rifle would still be there waiting for someone to start the revolution with it. Plus, it is more accurate than I had any right to expect it to be. It probably averages around 3 to 4 inches at 100 yards with Wolf ammo, esp from field positions, but I've got several 3 shot groups from the bench that came in at just under 2 inches with the same stuff. I attribute it mostly to the TechSights.
All the SKSs I've ever had the experience of shooting, including not only these but others from friends and such, have been 100% reliable, durable, and accurate enough for anything we asked them to do. If I had to list my favorites, it would be the Russian, followed by the Yugo, then the little Norinco, and finally the fullsize Chinese rifle.