Can a Bluesound Node 2i power supply really be upgraded?

Yes I have the Polish one and it's a great upgrade. I'm only using it as a streamer and pair it with a good LPS. Easy to install and best bang for the buck upgrade in my system. No question.
-Alex

Question is, if you spend the money on the the new board and a quality linear power supply, are you adding $600 or more to it? Might be better to look at another option. I have a Vault 2 and I’m considering moving on to a Lumin U1 Mini, which I’d probably still throw on a Teddy Pardo. Shame BS didn’t just build these devices with the cheap external switch supplies. 

@adg101 I've done the comparison with a $10k streamer (I won't say the brand but PM me if you'd like to know). Still preferred the PSU upgraded BS and used to $$ for home improvement projects.
-Alex

I’ve not come across anything for the Vault II, not IIi or might try it. I use a Teddy Pardo on my DAC and am I strong believer on power supplies... I’m a big fan of Walt Jung. I’m tempted to pop the case and see if it would be a simple affair. Half tempted to see if Teddy Pardo would take a stab at it and even ship my Vault II to them.

I do agree the BS sounds really good as a streamer, but I’m really curious what’s the next best cracker. None of our local shops carry anything in stock unfortunately, so I have nothing I drag home to compare. 

Meh.   
Anyway you cut it you are still stuck with BluOS