Totem Arros and Jolida Jd707a, what cables?

I know this topic has been touched upon, but do you think that I could benefit from replacing the power cord? if so, which one if the budget is $250 for the cable. Also, is there anything else I can do with the system to make it the best it cane be?

You can occasionally find the Totem Tress cable in the classifieds. As the Arrows are internally wired with it's probably the best to go for as impedance and capacitance will match.