Pawlowski6132:
I have been using a "true" bi-wired set of Kimber 4TC (tweeter/mid module) and 8TC (woofer) cables on my original VR-4's (and which I had previously used with my Vandy 2Ce Sigs). Though I have occasionally flirted with bouts of "upgrade" obsession, I realize that there is no rational need for me to spend any more $$$ on different speaker cables. Not that I'm saying their isn't something "better", but I believe the Kimber are very balanced, coherent, and a great overall performance/value, and moreso just wanted to offer my recommendation based on my actual use of them with VR speakers.
On the other hand, I also previously auditioned a set of the AQ CV-6 with my former Vandy speakers, and which I found to also be a very good speaker cable (and also for the $), so keep in mind that in your case, switching from the AQ CV-6 to the Kimber may only be a "lateral" move, (maybe even depreciative?). Note that I did not use the AQ cables with the VR-4s since my audition of them was at a time way before I made my change from Vandy to VR speakers.
I understand you're trying to "tune" your system, and I'm inclined to agree with the others about room tuning as a primary focus, and I'm not sure if the change you're considering of your already better than decent cables is prudent towards your objective.
Just my two cents.
Chuckster