Hi. Man, matching up cables to a specific system is pretty tough!
I personally think that you should listen to the system for a while after it has settled in. Get a good grip on the sound, and this may take a few weeks or more, depending on how much you listen.
Once you become acclimated with the sound, you can then decide where you want to take the sonics from there.
For example: Do you want more treble extension, is the bass lacking, could things perhaps be a bit more transparent.
I would then match up cables to my core components, so that they compliment strengths and weaknesses.
I hope this makes sense to you.
I know what I would buy for that system, for my tastes, with $500......
Bill