I've got both; I've had an SKS for years, and just picked up a CZ-858 (with the folding stock) following the election call.
If I had to own one, I'd go with the CZ. It's light, simple, handy, breaks down more easily, is easier to clean, and most importantly, the more sight of it makes Wendy cry and antis wet themselves as 99% of Canadians are unable to tell it apart from an AK-47.
That being said an SKS will serve you well too. It's not too heavy, simpler than the 858, durable as all heck, is a fascinating piece of history, and you can buy three and some ammo for the price of the 858.