Just got my Saiga 5.45 today got a chance to shoot 10 rounds through it and already like it better than the Century build.
If everything goes right tomorrow will do the conversion on it.
I don't think you will be sorry if and when you buy your Saiga. Caliber doesn't matter as you'll probably end up with more than one.
I'm already thinking of which will be my nest one. Will it be a .308, .223 or a 7.62? Doesn't matter think they will all find there way to me, LOL.