check out the info on sksboards.com
There are no real pros/cons to any of the sks's of different orgins. Only minor differences.
Basically yugo's are currently the cheapest and most readily found. They do NOT have chrome lined barrels, so used ones may have some pitting due to corrosive ammo.
Chinese are generally good quality and run 250-300 dollars. They have chrome lined barrels, decent furniture, and like other sks's, look a bit better/cleaner than the yugo's due to not having the nade launcher and such.
Russians are excellent but expensive, 300+. Basic design, no extra crap like on yugos. Chrome lined barrels.
Albainians are similar, sometimes slightly rougher quality.