Is there a reason you're not considering the obvious choice of a used Atma-Sphere MP-3?
Whatever you select, I recommend a balanced preamp to take advantage of the balanced circuitry of the S-30 since Atma-Sphere is optimally designed for balanced operation.
Whatever you select, I recommend a balanced preamp to take advantage of the balanced circuitry of the S-30 since Atma-Sphere is optimally designed for balanced operation.