My views after watching Toms review:
Silence - Buy the R4
Gaming - Buy the Arc Midi
I really think if they made the R4 slightly higher and fan mounts to accommodate a 240 radiator or a H100 they'd have nailed it.
I also find it a bit weird just weeks after announcing an optional window panel for the R3 they then release the R4... and its obvious from the review that the window panel for the R3 won't fit on the R4
What really baffles me is though... Fractal Design have no intention of releasing a window panel for the Arc Midi, which is basically designed for gaming yet they released a window panel for the R3 which is designed for silence. That doesn't make sense to me.