Sometimes in the same brand but different model psu there can be drastically different filtering and ripple scores. Research carefully what psu you want. Given your expensive setup, I think a power conditioner could contribute a worthwhile amount to sound quality, but I would not spend more than ~$200 for one for the computer. The computer is very emf/rfi noisy, and there's many things you can do to improve the computer other than more filtered incoming power. Such as giving separate portable psu's for inessential components, taking out unnecessary hardware like video cards, new software and bios tweaks for reduced power consumption and asio/KS/wasapi, and internal emf/rfi shielding. Imo computer transport is not something you want to spend too much time/money maximizing, it has too many things to overcome to become a hi-fi transport.
I have 3 furman ac-215's because I like how it improves audio and video electronics with acceptably low degradation, and because I got them all for ~$75 each used or new on ebay. They used to cater primarily to studios, their ac-215 is aimed at consumers, but it is excellent imo, I notice some good results even with audio equipment with massive psu's. Also getting an audio-gd power filter soon, already ordered. Will see how they stack against each other, will be interesting because both companies have much of the same philosophies about audio electronics.
