It's just my opinion, but I don't think power cords are the best place to upgrade given your components. I don't see what type of speaker cables you have listed above. If you didn't buy anything yet, a double bi wire run of speaker cable will make a very big difference. I have the same speakers as you in one of my systems and I use 2 runs of CV-8. If that is too high price wise, you can get most of that with 2 runs of type 8. (I was able to demo both at the same time in my system.) No other cable upgrade will make a difference that big. If you do get them, make sure you get the 1/4 in spades and if you buy both pairs at the same time, AQ will terminate them together at the amp end so it is much easier to work with. As far as power cords go, I would just wait until you are sure that you are done upgrading the electronics. More often than not, power cords will hurt as much as help. You really have no idea until you try them and they are very likely not to to work with future upgrades if you get them now.