I just used quality "computer" cords and that was enough.
It may have been enough, but they sure as (add your favorite expletive) wasn’t quality.
My advice would be to only buy one cable and put it on your power amplifier. Spend the money you budgeted for three cables on a single cable of better quality than what you were looking at.
At 130 watts, your amp draws barely more than 1 amp, so cable gauge and current capacity shouldn’t be an issue.
I use tube equipment and found wireworld cables work well for me. As a first cable I’d recommend an Aurora - it will give you a nice bump over the computer cables and not break the bank. I advise to go 2mtr or longer for best result.
I recommended starting in the power amp, but you should switch it around and see where you get the best improvement.