Power plant and power cords upgrades a real wow?

Leherepkai is dead right with the above comments. The challenge is that you don't know what your weakest link is. In my system, the biggest change I got was replacing my duplexes with Audio Magic duplexes. It made a huge--not subtle improvement with a $135.00 investment. Another person may do the same thing and hear little or no difference. The next most impressive improvement was installing a $500 Audio Magic Blue dot, which removes noise from the grounds. I have tried a few PCs and found the differences to be generally subtle. I just don't think you can generalize on this stuff. My advice is to start with things that are fairly inexpensive. That way, you don't put $4000 into new PCs only to find they make no difference. I can tell you that I would never spend a lot of money on a PC I couldn't return for full credit.

My opinion. Put your funds first into dedicated line and next upgrade your turntable cartridge. Power conditioner is down the line from those.

I agree with airegin. Dedicated lines! Piece of cake for an electician. You will hear the difference immediately. Then call Jerry, from Audio Magic. He will get your electric as clean and tasty as can be...When you start a garden you want to have fertile, rich, soil, yes? I feel the same way about electric in my rig. Many feel different about electric, but it has worked for this audiophool.

As your system is set for the most part, wondered what of the room. Have you given thought and resources to room treatments? This may yield bigger improvements that power cords and such.

Along that line however I would first invest in dedicated ac runs for my gear.

You have a sweet system. Post some pictures. Post your results as well.

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.