@ted_b
Yes, I have extolled the virtues of these R-core power supplies here before (I have 3 of them, all 50W versions here, so a few more dollars (maybe $20-$25) than the one you linked to. Overkill for a Wiim Pro + or a Fiio K11 R2R which is what I'm using 2 of them on? Perhaps, but the proof is in the listening.
They are grossly superior in terms of build quality and sound quality to something like the LHY LPS15VA, which is a toy by comparison. Yes, that will give you some improvement in sound quality but nothing like the LPS that Gabster tested and you linked to and I also own.
You will not regret going overkill on a power supply like this and, as you say, it does not need to be a costly exercise.
Good quality power cords are also important here (Preffair 503 with copper connectors on Aliexpress is outstanding) as well as a quality DC cable from the LPS to the DAC or streamer. $25-$35 will get you a very good silver plated copper or even all silver DC cable (USB C to fit the Wiim if you like) from someone like KAM Audio in HK that will also be a marked improvement over the giveaways that generally come with these power supplies.
So pretty easy to come in with something very, very good all in for around $200 U.S.