For your situation I would go with the Saiga. This is why: You said it was a really good deal. Such a deal may not come around again and you could be kicking yourself for not getting it when you had the chance for years to come.
Also it is 150 euros cheaper then the bolt action. That gives you more money for ammo, mags, optics, and etc.
You can save up and get the bolt action later, then you will have both. And if you are anything like me eventually you will want to have both, so get the one that is a good deal now and save up for the more expensive one later.