Aluminium 5083 stiff enough for electronic keyboard enclosure?

I’m working on an enclosure for a compact electronic keyboard system, including a weighted key mechanism, and have chosen Aluminium 5083 for all parts due to its corrosion resistance and machinability. My main concern is whether it provides sufficient stiffness to handle the mechanical loads and vibrations from the key mechanism without excessive deflection. Question to the community –would you consider Aluminium 5083 appropriate for this application, or would a material like steel or stainless steel be worth the additional weight and cost for improved rigidity?