Well, I don't know about a war but I wouldn't B surprised if this thread gets as long as the 'Valhalla AKSA 55' one!!
Here's the gospel acording to St. Andrew ... not that I, personally, make any claim to being an expert - I am simply standing on the shoulders of giants (... so this is what I have picked up over the years from the people who do know)

:
1. Yes, keep lengths - of whatever - short.
2. Yes, try to keep them even but this is not as important as #1 (do the physics!).
3. Wire routing inside the case is important.
4. Don't use plated wire.
5. Use solid-core, not stranded.
6. Thinner is better, for IC wire ... but it becomes increasingly difficult to work with, not to say fragile!
7. Ag vs. Cu ... that's a personal preference! Theory seems to imply Ag should be better but many people (Hugh included) say it introduces HF 'tizz'. I've never tried it.
8. Whatever you use, the purer the better - you can buy '6 9s' Cu - ie. 99.9999% - but I don't know how pure you can buy Ag.
9. Thinner is also better for insulation - hence enameled magnet/transformer wire will probably sound better than the same wire, teflon coated, bcoz the dielectric is so much thinner. It's a pain to work with, though.
For good sound, Teflon is better than Kynar which is better than PVC. Air dielectric is the absolute best but how do you stop the Cu/Ag from tarnishing? (Use gold wiring instead?)
10. Here's a controversial one ... I've read that making the 'earth/return' wire a thicker guage than the 'signal' wire has a beneficial effect

!
The best way of testing different wires is to make up some extremely long interconnects - say 10m! Any small differences will sure show up

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Regards,
Andy