I wouldn't replace the Bluesound Nano supply. If you want to improve your power supply, you should use a PSaudio power supply for your whole system. It will provide clean power to everything, which will dramatically improve your sound.
Power Supply Upgrade for Bluesound Nano
Just purchased a Bluesound Nano to use as a dedicated streamer/dac. Performance is outstanding, but am considering a outboard power supply upgrade.
My system is currently comprised as follows:
Belles Aria Two Integrated Amplifier
Bluesound Nano
Vandersteen VLR-CT speakers
Audioquest Cabling and Power Conditioning
Skylan Speaker Stands
Considering Sbooster or Ifi power supplies. Any recommends would be greatly appreciated.