@Gedgn I was looking around for some other cases, but then: Phanteks Pro M SE <-- This case; Wow (price is a bit less wow, but still). The fact that it has good airflow, fits a front 280mm rad and has room for future expansion, are big plusses for me, which more than make up the price, which isn't that bad either. The more simpler design is also something I like.
@WoodenMarker The H500 would have been a great choice, but this trend of 'gamery/more extreme' looks is something I don't really like in pc cases. That was also the case for the H500. Still, thank you for all the alternative suggestions!
I'll cut down a bit on the psu, as it was overkill, so that also makes up for the price increase for the case. Everyone, thank you for all the help, advice and recommendations! You really helped me out here!