I've not used one of the MCRU lps but have tried one of their power cables a No88 I think. It solved a slight RF problem I had, I assume from the old cables shielding not being good enough for the situation. Good cable but definitely at the upper end of what I would pay.
I use SMPS power supplies on almost all the WIIM/Linkplay devices I have, I run one off a battery for the garden in the summer. The main reason is they mostly stay on all the time and use less power. I have tried to use fairly good ones with no fast charge capability, as I did bump into issues early doors with some cheap ones and fast/PD chargers. The bad supplies caused varying degrees of humming from the speakers when connected by RCA, from barely there to downright annoying.
SMPS use less electricity but I suppose you have to balance that with the fact you would be presumably turning off the LPS.
I know I saw a report on the forum of a member saying they had good results from a Topping P50. Its cheaper than the MCRU LPS. Obviously the iFi's are SMPS devices, with some kind of noise cancelling feedback tech built in, but area around the Toppings price depending on Sales etc.