Thank you all for your opinions. As I mentioned earlier, this is my first sword, and with it I started to learn more, and with more knowledge comes greater appreciation. (also it is by far easier to learn about swords with the book in hand and the sword in front of you on the table so you can have a quick look on what you're actually reading about)
I decided to buy exactly this sword because it was made in Seki, mino, which was the place where I first saw the beauty of Japanese swords during an exchange, and I'm very proud to own such a work of art. In a movie about Howard Carter, the one who discovered the grave of Tutankhamun, he was asked how to tell if something is original or fake. He replied: If you buy a fake copy, it will become duller every day, but if you have a genuine work of art, you will appreciate it more with every time you look at it.
That is exactly how I feel about my sword... Sorry for getting emotional, my wife just told me to marry the sword haha ^^
By the way, here are some more pictures of it:
And here some more of the fittings