That is a very long distance, if you are asking about speaker cables.
Especially so when wanting something good for under $500.
Given the extreme distance, I recommend Audioquest cables with the DBS. Unfortunately, I doubt you will score a pair used at your desired length, but I think the DBS will be something that will aid in signal degradation- something that will occur at such extreme lengths.
I have tried Transparent and found them lacking, and also super expensive, compared to AQ.
Bob