I have a romanian, a yugo underfolder, and a norinco. and have been shooting ak's for years, I would stay away from the wasr's as they are very hit or miss, other than them I have never seen an ak not go bang every time the trigger was pulled.
So long as you get to play with a Century before you buy it and get one that you like, you really can't go wrong. I had one WASR that was a turd, other than that every single AK I have owned owned or fired, worked great.