More control and fastness is what I need.
What Dynaudios are you using? Control and fastness is a trait related to speaker critical damping and amplifier more than a cable. It is quite unusual for people to complain that Dynaudios are slow and lack control. Are you using a tube amp perhaps?
The ported 52 SE seems to lack woofer control but most Dynaudios are very controlled. Some Dynaudios take a long time to get used to compared to the typical warm resonant bass of other designs (usually reported as long break in times, as people get accustomed to the new sound)