Zippyy, You have a very fine rig! You really owe it to yourself to experiment with some decent cabling! Especially power cords, since they can be had for far less than many speaker cables. With your set up I'm sure you'd hear a difference!
I agree with much of what Muralman1 says, except this:
"In your instance, Zippyy, I think your system would benefit from a devalued speaker cable, meaning costs less money."
Huh?! Maybe it would benefit a bit, but more likely it would benefit little. Zippyy has a decent rig, and he should not skimp on cabling. If he did, he'd likely conclude it's not worth it and make the WRONG conclusion for the wrong reason. I would urge people NOT to go too cheap on power cords! You want too much of something for nothing, and you'll often get nothing for something! You're not going to get "sky's the limit" performance from a $100 cord. If you have a good rig, you'll likely be able to tell a slight improvement. But if your rig is mediocre you may not (not referring to Zippy here!). The more invested in your system, the more you should invest in serious PC/IC/SC. As I reviewed the MIT cabling, I found a significant difference in upper echelon PC's versus entry level ones. Just like speaker cables, the technology and performance really can ramp up as one moves up the line.
At one time, I was a complete cable atheist. I did not believe in them. It was only when I dared to test it that I heard for myself, and that was only effective when my rig was at the point of revealing the changes. Zippyy, you're rig could do that.
Please understand that I am not dissing economical rigs! For much of my life I was the guy with the very economical system. For well over ten years with various equipment I would have had a difficult time assessing a change with $100 PC's! As a rough rule of thumb, if your rig is under $5k, then maybe cords under $100@ could help. If your rig is above $10-12k, you should put some decent money into the cabling and you SHOULD hear the difference. If you don't hear the difference, then move on quickly and try another cable. There should be an immediate, easily perceived change - on the order of taking at most a few minutes to hear/notice. (Caution: Only with time, however, can one determine if the long term enjoyment of the change has merit) On a system below $1-2K look for a component change first before blowing lots on cables.
Many may not believe this, but I can hear the difference that one PC makes on my rig, and with very high end cables it is quite a noticeable difference. Or the distinction that changing the setting on the MIT selectable impedance switch makes. When a system gets refined enough, even miniscule changes are detectable. I think those with extremely high degree of synergy in their rigs will agree.