Good power cord vs Killer power cord?

Ahha! Clarity at last. I think I'm thinking what you're thinking. Ouch, that hurts(just kidding). But, what I believe that you are suggesting, is that your pc will fix what ever you feed it, therefore, the good stuff should be between the pc and the equipment. Is that it? That might be valid, depending on the pc. With my Walker Velocitor that is not the case; but with something that regenerates power I could see your point. Still: synergy, synergy, synergy; not just between the cords, but between the cords and the equipment. You're going to have to play with this.
Keep me posted.

This may be a bit on the low-end extreme, but last week at my local electronics store (Metro, Sacramento) while getting RCA connectors for a project, I purchased for about $6.00 a 14 ga 6 ft. power cord thinking it has to be better than the 18 ga stuff that comes with everything. I currently use Analysis plus oval silver (highly recommended) cord on small amp, other stuff is just mix and match. I put 14 ga cord on the TV and got same results as the Adcom power conditioner I was trying out (better black levels, crisper edges, smoother not-harsh sound outputted to the receiver)!! If you need something a bit better, I can recommend the standard copper Analysis cord in the $125.00 area. Anyway, I always like to try out the easy cheap stuff first, good luck and let us know what you wind up with.....Mike

Its hard to say, either place you put it will be the weak link. My experience has been that power cords on power conditioners and digital make the greatest difference, I can't tell you which one is greater. I don't agree that the power cord coming out of the wall is simply an extension of the in wall wiring, not with the great differences I've heard in various power cords going to the power conditioner.
You could also argue that since the cord coming out of the wall is the first in the chain it is the most important, it feeds everything to follow. As the others have mentioned, try both ways and see which is best.

A good power cord will be insulated. A Killer power cord will not! ;-)

I would also try killer cord directly from wall straight into the amp. My experience has been to use the conditioner only for source components. It may or may not work for you, but worth a try.