Hey buddy, you got good news for us, as I can see.
Hi Gamblet,
Glad to see you in your usual good mood.
By the way, frootloop is my favorite cereal.

And like I said on my last post, I was already on these new pills when I write that post that you so lovely compliment me about.
Anyway, this is great news indeed, about the Energy speaker set, great price too. I'm happy for you. Things are rolling just fine, when you take time on your side.
Now, for your loudspeaker cables, your first link is inoperative! Oups! It's working now!
But I'm sure they are just fine. Just try to stay with 14awg, with good purity copper of 6N or so (99.9999% copper). If it doesn't say, that's OK. Copper for sure though.
* Hard to tell from that link what it is exactly in American language. But it is copper for sure (it cannot be brass, duh). Make sure it's not 18awg (gauge). At the very minimum, 16awg, but 14awg will be preferable. I recommend 14awg.
And if your Energy speakers accept banana plugs, you'll need a bunch of these too, at both ends of your speaker cables. You can find some cheap ones, gold plated and easy to install. I like the ones that have two small screws that you just tighten up over the speaker cable, quick and do the trick. And just a couple dollars a pair.
Check with your dealer(s), if they can give you a good deal on these, if they do carry them (they might very well do). Or just check online.
And for your sub interconnect, it is excellent. The price is very reasonable too. Just make sure that is long enough (2.5 meters should be fine).
* But it does look like a Digital coaxial cable (with 75 ohms impedance). That should do though. Unless another member like to object...
You just need an audio analog cable with double shielding (50 ohms impedance). Again with 6N purity copper content.
Gold plated RCA male jacks are perfect though. And not plastic ends, but full brass or metal gold plated phono plugs.
All right for now, keep in touch, just the way you already do.
Bob