Sonically - I think the stock PSU actually does the job very well. Wouldn't really bother about upgrades...
If you've read the thread, you can see that I had some trouble with my sample. However, before it broke down, I ordered a new one, which now is awaiting PO pick up :-) The one that malfunctioned is now sent back to china, seller said to repair or send a new one. We'll see.
I've been thinking about this PSU, but the prime reason is that it has an on off switch and that I can connect several muse dacs to it useing a Y-DC cable. Haven't tried it though.
BTW. I opened up the malfunctioned muse dac. On the circuitboard it said iput 9-13V. So I inserted a 9V/1.2A powersupply, but the dac started to smell funny pretty fast. It did not with the stock 12V. According to my understanding of things, 9V/1.2 ampere should work? As you understand, I know very little about the current-stuff, Volts and Ampere etc. Read this thread's earlier posts, or just ask SPWild :)