RF is still an issue and should be considered, directly on the input connections and through casework. Metal case will perform better for shielding however it should be stressed that the end result, how sensitive the unit is to RF, will depend on many circuit variables and it really is not necessarily true that this unit would have any I'll effects due to a plastic case under normal conditions. Ie not living next to an AM transmitter.
Has anyone had any audible interference issues with Atom?