I need advice for power cords


In my system there are 4 components that power cords are interchangeable.  They are PrimaLuna EVO 100 Tube Preamplifier, PrimaLuna EVO 100 Tube DAC, Manley Chinook phonostage and Dayton Audio sa1000 subwoofer amplifier.   Should they all be upgraded, if not all which one to change to give me the most improvements.  I can't go crazy on cost, 1k to spend.   I've followed along with many threads on this subject. Always looking to make improvements to sound quality.   Many of you have much more experience with cables than I do so what do you recommend and I can do the research.  On a side note my McIntosh MC75's are vintage so old thin manufacturer cables and probably shouldn't change them. 

Thanks 
Mike 
zardozmike
An isolation transformer like Torus or Topaz is also on my list to explore. Balanced power also. Heard a lot of good things about them. But my opinion on house wiring stands. Get the electrical foundation right and then shop for fancy power cables. It doesn’t have to cost a lot of money. Our hobby deserves it.
What do you think about upgrading the power cables for the MC75's?
I know they are vintage but would really like to improve the whole system sound quality.   I'd like to improve everything without buying new amps.  So what are your opinions and how could it be done. 
I would buy 4 anti cables level 3 cables. Or try a few cables mentioned in this thread. I guess that you are happy with your equipment, but you want more performance out of it. Good power cords make the sound bubble bigger (wider & deeper) and also cleaner (more details) because your equipment is performing better. 
I am not into cables but I was speaking to Fremer the other day and he told me that Audioquest makes the best power cables for what that is worth.
What do you think about upgrading the power cables for the MC75's?
I know they are vintage but would really like to improve the whole system sound quality.  I'd like to improve everything without buying new amps. So what are your opinions and how could it be done.

Read above. CHANGE them. The PS on Mac make them a lot less prone to bad cable. That is the reason they sound good with that dinky PC. Upgrade it, you might get a pleasant surprise. First thing on the list after a newbie arrives here. Listen, listen, listen, change the PC. Then listen. Hee Hee you'll like it..Not to expensive, great upgrade..

Regards