If I remove the side fan and get just a side-window, but add the additional exhaust to the top, will I do anything to screw up the airflow and cooling of the case?
What I did is remove the funnel thing from the side but left the fan there (then the bracket fits). The top exhausts the rear one is the important one the forward one makes little difference (I saw no temp change adding it). The duct thing that you can add a 120mm fan too doesn't make a massive difference either I think its more a marketing novelty than anything practical