I didn't like the low wattage, high price, and heavy heat of a powerplant, so I looked for an alternative. I bought a used Richard Gray Power Company 300 for $550. The music seemed to come alive. It had extra energy. It also worked wonders with my son's Pioneer receiver based system. Then I bought a second one, and the improvement was noticable, but not as great as with the first RGPC. I'm very pleased.
Be aware that I do not think the RPGC works well with equipment that has a very well regulated power supply. Some people have not found any improvement. It appears that those who have not found improvement have very highend equipment. In fact, that occurred with a Stereophile review, which could not find the RGPC to work with his system.
You really should try it first.