My supplier still doesn't have the regular case (both sides dampened panels) so I took the case with dark tinted glass
As the case is so large and the case fans are big, 140mm, they can run at low speed and the overall build is very quiet when CPUs are idle
After hearing the noise levels at full load, I don't believe the dampened panel would make much difference so it is more a matter of personal preference choosing between glass or the regular panel on this case.
As there are some flashing leds on the motherboard, the glass panel might be annoying if the machine is installed in a location where somebody sleeps.