Hi @knownothing
I'm using the Swagman SE on a reclocker in my digital chain. I have the iFi SPDIF iPurifier and it's inline with my Node 2i. This iFi device with the stock wall wart provided very little improvement removing jitter and noise. I experienced a significant SQ improvement after swapping in the Swagman to power the iPurifier. The data stream from the Node2i doesn't perform at the level of my Audio Note dac so I installed a reclocker. Now my streaming has improved to near CD quality. I also use a Cullen C7 power cable on the Node; big improvement. I would imagine adding a LPS to the Node would be a significant upgrade over the small internal SMPS.
I spoke to Teddy Pardo about a LPS for my Chord and felt very confident about using his power supplies. If you really like your Node and its interface, installing a LPS would be a great upgrade. However, I don't feel a Pardo would be cost effective on the Node. It costs about the same as the Node streamer. There are less expensive options to power your Node.
I would use a Teddy on a dac, although the Swagman SE would save you some money. But after seeing the positive user reviews for the Teddy/DAC combo, it might be worth it.
Sorry for such a long-winded response.