Pro-ject Tube Box DS - power supply

I just bought a used Pro-ject Tube Box DS (not DS2) and will install it this week with some new tubes from National (Canada) that are recommended by an on-line tube retailer. I see a number of "audiophile" separate power supply boxes from China for sale that work with this model but do not know if I would perceive any sonic difference (or reduced hum perhaps) if I spent $130.00 for an external power supply. Anyone have any experience or insight that might help my decision?