I found power conditioners have a detrimental effect on power amps, whether they be low powered valve or big ol' current dumpers, they rob dynamics etc. On source components for me the jury is out.
In my experience you gain more advantages by having your hifi on a completely separate ring from your main fuse box and rewire the ring with good quality mains cable and wall sockets. The next thing you can do is star earth your equipment to an outside earth spike/rod, again use good quality earth cable.
All this would cost far less than $4000, spend the rest on a system component upgrade, whether it be source, amplifier or speakers.
In my experience you gain more advantages by having your hifi on a completely separate ring from your main fuse box and rewire the ring with good quality mains cable and wall sockets. The next thing you can do is star earth your equipment to an outside earth spike/rod, again use good quality earth cable.
All this would cost far less than $4000, spend the rest on a system component upgrade, whether it be source, amplifier or speakers.