I have a feeling that your I7 3770k is going to be the bottle neck that is going to hold your gpu back. Once i got rid of my 3770k, I gained 20-30 fps on Asylum.
In the same light. A GTX 970 is going to be your best bet to stay around the price that you are looking for. Even a GTX 960 if you need to slim down your budget a little further.
100-200 euros is equivalent to of $110-$220. If that is all you can afford then the 960 would be your best bet. If you can get a little extra you should go with the 970.
Good Luck with your search.