I have been through tons of speaker cables and I can tell you that you do not need expensive cables to enhance characteristics of the 3.6. There are several sub 1K cables that have worked better for me than many low to mid 5 figure cables. All depends on your tastes and your amp. Enjoy those great speakers!
I am thinking whether it is a good thing or a bad thing. It could mean the bottleneck could be in the internal cables used for the particular speakers. So the overall improvement by the external cables is held back by the quality of internal speaker cables.
I have used various cables in my speaker designs. I have used some cheap cables from Fry's electronics and Supra cables from Madisound and the Supra cables significantly improve the sound.
I have seen various pictures of the CS2.4 xovers and although I don't have any information on the cables used, something tells me the CS2.4 could use some improvement on the cables used in the xover wiring.