In case anyone is looking into buying an SSD.
Before christmas I checked what the best choice would be for me (Quality + price-value).
I concluded on SanDisk Ultra Plus 256 GB (http://geizhals.de/eu/sandisk-ultra-plus-notebook-256gb-sdssdhp-256g-g25-a890676.html).
If you plan to buy from Amazon please use one of the following links - we will be able to cover some server costs from the affiliation Amazon.de (http://astore.amazon.de/docl-21/detail/B0093HMLAS).