This is just my experience, but I can't see how the cables are going to "fix" your system. I've always found tweaking with cables is just a way to extract a little more performance - I think it's the Paradigms and/or the room. When you decide on new cables, and if they give you what you want, I'd be interested in hearing your views.
Signal or Transparent speaker cables???
Currently I have Monster Cable MCXS2s. I am going to upgrade speaker cables. My system is Musical Fidelity a3.2 integrated, a3.2cd player, Paradigm Studio 40 v.3 speakers, and a REL Strata III sub. The sound seems a bit harsh. A Transparent dealer let me try a loaner pair of Music Wave cables. They make for a smoother and more pleasing sound. I am also thinking of Signal. My run is 15 feet. This is longer than Signal will let me return if they aren't what I like. Any thoughts about the two?