Sorry for the triple post but I have to say something.
Samuel, you are somehow right! I have moved my PC on the desk, behind the monitor. 47*C Idle.
at the start but then gets up to 50 but gets low again, so the space is really not the problem, but I will keep my PC up here. The temps are lower then "down there"
Now, I don't know, should I really buy a new case and wait a looong time to get a new cooler or should I buy the cooler and leave the case for later?