I have a Norinco SKS and I really like it. I have shot the cheapest AK (WASR) and was not all that impressed. What I like about the 7.62x39 round is of course the stopping power within that round. The SKS is just heavy enough so that when shooting, the rifle doesn't knock you around that much.
I have heard that the SKS is possibly a little more accurate than an AK due to the different way the internals are put together. The AK's gas piston and bolt are all one piece, so when that is fired, it creates a lot of movement in the barrel and such. Watch a slomo video on it. The SKS bolt carrier and gas piston are all separated.
Supposedly, both platforms are just as rugged as the other. Drop it in the dirt, mud, water or what have you and it will still fire.
The only drawback that I have encountered in the SKS is in fact the mag capacity, but you can look at it two ways. On one hand, it does limit you to 10 rounds, but it kinda keeps me from just blowing through shots and slow down to take my time shooting. I have tried one aftermarket magazine, and it just fell out. I have seen videos with the TAPCO 20 round mags, and that is tempting to do. You have to sand off some of the stock on the inside to make them fit, but they will work if you do it right. The only thing about the detachable mags is 1) the bolt has to be open to insert the mag and 2) the mag may or may not hold the bolt open on the last shot.
If you buy an SKS, [b]do not buy an Albanian model![/b] The yugo, Russian, and Norincos all work about the same. The yugo models have some extra bling like grenade launcher sights and stuff. I personally like the Russian models the best. I love the cherry colored tiger stripe looking wood that most of the stocks on them have.
That's alot of reading but just my experience/opinions on the SKS.
Here are a few from Wideners:
http://wideners.com/itemdetail.cfm?item_id=100001081&dir=700|701|1029
http://wideners.com/itemdetail.cfm?item_id=100000439&dir=700|701|1029
http://wideners.com/itemdetail.cfm?item_id=100001072&dir=700|701|1029