As you can see, you have opened a very sour can of worms. Cables are probably one of the most hotly debated subject on forum around the world.
Some will tell you that common garden variety figure-8 twin lead wire is as good as it gets. Others will swear that their high end cables make a tremendous difference.
I take a more middle of the road approach. I think the budget for all cables and wire should be about 5% of the cost of the system. Notice I said Budget
, not spend. The 5% sets a reasonably bounded framework. From there you can spend more or less as you please. Also note the most shops and most salesmen will tell you you need to spend 10% to 20% on cable, so relative to that I am still restrained.
The Revel Performa F206
are about $1500 each or $3000 total.
I don't have a price on the McIntosh MA-6900
but I found a used one for about $4500, so I'm guessing the original price was about $6000 (just a guess).
So, let's say your overall system is about $12,000; 5% of that is $600. But I assume you have money into RCA cables and other misc cables. So, let's best guess $300 to $400 remaining for cables.
Since you didn't give us a budget, I have to assume the budget above. Further you have not give us Length and the type of Terminations you prefer. If Banana Plugs, I would consider Locking Banana Plugs.
Others will vehemently say that this method is wrong, all the while running around in endless circular argument that lead no where. I'm not here to debate the merits of cables, rather to simply help you find something that suits your needs.
Also, keep in mind a large part is cosmetic, though that is a legitimate reason to like and buy a cable.
The Kimber Kable 8TC
are the equivalent of 9ga wire. I'm not sure how powerful your amp is, but I suspect it is not powerful enough to demand 9ga wire.
A quick sample wire pair of Kimber 8TC,
8ft were about $460. The Kimber are LITZ wire, several individually insulated wire woven into a bundle.
I would suspect that the Kimber 4TC
is the equivalent of 13ga wire and would probably be adequate for a vast majority of people. This would be about $275 for an 8ft pair terminated with banana plugs.
Audioquest Rocket 33
for an 8ft pair with Silver Banana Plugs on each end are $300.
If you like the QED Anniversary (though you aren't clear on specifically which model). I assume this is the cable -
The latest QED Reference Series Cable is the XT400 X-Tube design which is the equivalent of 12ga speaker wire -
I'm not sure where you get QED cable in the USA. I can find price in the UK, but it seems well under your implied budget. I think we are talking about £100 per 8ft cable. I'm going to guess that that is $150 per 8ft cable.
Audioquest is a very straight forward cable. The Kimber is a unique woven Litz were model. The Litz wire could potentially be a problem simply based on the fact that it is slightly exotic, though they this is very popular, so it must function reasonably well.
I think rather than endless circular debates that lead no where, we should simply try to help this guy find some wire that meets his needs and his budget.
Other options are Cardas, WireWorld, and other.
I think, overall, Audioquest is a pretty safe bet.
But then .... that's just my opinion.