Help me choice Audioquest speaker cables

I compared AQ Firebird speaker cable combo with AQ William Tell (Silver) speaker combo in my system.  IMO and my representative opinion, there was very little difference when streaming HD music. Considering the FB cables are over 6 times the price of the WT, we decided the WT were the way to go. I also discovered using spades at each end to connect to Mac mono-blocks and B&W 800D speakers provided a stronger connection (the banana plugs pulled loose, due to the weight of the FB combo).  

AQ Rocket series of cables are great high gauge cables. Mac amps benefit from them. Rocket 44 cables would be my choice as I'm not crazy enough to spend one stratospheric priced cables.

The Rocket 88 is a very good cable that represents a "sweet spot" of sorts for price-to-performance. Even on a modest system, I heard a big upgrade from 88 over Rocket 44 (both single biwire configuration, both modern versions, to be sure -- since Rocket production goes back many years). It's a good cable you can stick in any system in need of a good cable, and get good performance.

Above the 88 is where it gets tricky - system & preference matching becomes key. I've had my share or exotic older AQ silver cables (KE-4, Kilimanjaro x2, Everest x2, Wildwood x2, Thunderbird Zero). Sometimes, in some systems, the silver cables simply run away from 88's, revealing a large chasm of difference in detail and dynamics. Other times the 88's hold their own quite well; their natural warmth can actually be quite seductive. The Thunderbird Zero didn't do it for me -- I think, as they say, these really need to be the biwire version to show off. I wouldn't recommend just using the Zero as I did. AQ recommends William Tell bi-wire over Thunderbird Zero alone, and I believe them. 

Better off changing a few capacitors and resistors as cables can vary depending on your components especially if you buy and sell them at various times.

I compared AQ Firebird speaker cable combo with AQ William Tell (Silver) speaker combo ...

Nice to know.  My next speaker cable change/upgrade will be from copper to silver like my interconnects, so I was debating between these same 2 cables models.  Probably go for the AQ Dragon or VooDoo PC upgrades someday also.  The AQ Dragon speaker cables, not within wallet reach but there are other toys...