Run it directly on 240 if possible. It lowers the power line impedance, ensuring that the DC rails stay up at their design voltages under heavy load (35 to 40 amp peaks). Switching supply amps benefit from this even more, as it typically changes the PSU configuration from full wave doubler to full wave bridge. That makes the 340V raw DC A LOT stiffer and the caps last longer. And that’s in addition to halving the current from the breaker box.