Length of speaker cables

As said by @jjss49 , shorter is better, all other things being equal. It means less R, L, C to interact with the speakers. So, I suggest you try to borrow a shorter set of cables or buy them with right of return.

Many who go to monoblocks use very short cables, a meter or less. Possible in your case (at least for comparison)?

Both parts of "audible improvement" are hard to predict in someone else’s system; i.e., whether the difference will be audible to you, and whether you will think it an improvement. Not all differences make the sound better or worse.

One of the benefits of switching to mono blocks is the ability to use shorter runs of cable. It is not imperative that you take advantage of this opportunity, but why wouldn’t you? This is an excellent time to upgrade, If you are going to use the the same AQ cables in a shorter length, you will probably not notice a difference. Use the shortest length of upgraded cable possible; it will look neater, impress your friends, and sound better. While you’re at it, replace those standard power cords with some better ones. Enjoy!

You should hear no difference.

Try Morrow cable website. Good cables at a reasonable price. And I believe they have a sale going on.

Make it shorter, it will be neater.

For whatever it is worth, my speakers' instruction manual says to use as short of a cable as possible. I doubt the difference in you cutting yours in half would be audible, but less mess cannot hurt.