Well, for more info on the SKS, check here:
www.simonov.net. Simonov was the one who designed the SKS.
I had an unissued Yugo (sold it cuz it became too much of a safe queen), and it shot 2" groups at 100 yds consistently with American Eagle ammo. Worse with your typical Wolf/Brown Bear/Silver Bear/surplus stuff, but I think it's more the ammo than the rifle. If you're just looking for a shooter, and it sounds like you are, the Yugos are definitely the way to go. The Russians are darn pretty with their laminated stocks and chrome-lined bores, but they command collectors prices.
Also, you might want to look into aftermarket sights for the SKS. Many people have had very favorable experiences with Mojo, Williams, and now Tech Sights. They really help.
I'm also kind of picky about triggers, and the SKS trigger is...well, challenging. Wolf springs and a little polishing helps, but it still feels like a 13-stage trigger pull.
Good luck. Post a range report if you do end up buying one, eh?