I recently upgraded all my stock PCs with Shunyata Venom 3s-only $125 each. I also got a Blue Circle Thingee (its a power conditioner) for $300 with a 20 amp connect, and a Shunyata 20 amp Venon 3. I plug all sources into the Thingee, and my integrated amp straight into the wall (with a 20 amp cord).
I agree with Elizebeth that it will not transform the sound of your system, like a new source component will. But for my modest system, I think the benefit gained out weighs the cost of the upgrade.
I agree with Elizebeth that it will not transform the sound of your system, like a new source component will. But for my modest system, I think the benefit gained out weighs the cost of the upgrade.