Length of speaker cables

+1 for volumizer...

Why change your cables? With the length you have, you could cut those down probably to where you could use a whole cable per binding post - twisting the amp ends together may be a challenge, but I would use as much of your existing cable cut down to short little bundles as possible. Whatever you could fit in the spade to crimp. You won’t regret that and would make your Rocket sound like some of the bigger AQ models, and better.
There will not only be a difference going shorter, but an improvement!

straight from Richard Vandersteen. Shortest speaker cable possible and longer component cables equal better sound.

Don't forget to factor in the cost of longer power cords if you are moving your power amps close to your speakers. Going cheap on longer power cords could be a big mistake. In fact, going cheap on any power cords is a big mistake.

Depend what kind of equipment you are using, Sometimes it is not worth to do anything, sometimes it is better to go with better cables 

Well, I run 20’ Vandenhul bi wire cables from my CJ Premier 12 mono blocks to Vandersteen Quattros. I don’t have much choice due to living room layout and wife’s preference.

Am I losing out much?

Thanks