Yeah, i know it's a topic of debate among many people. I would have to think that it does matter some, and that might be dependent on the other components in your system as well. Guys with very high end systems seem to think cables can matter a great deal, but that may have other factors, including experience (age; being able to build up to such a system and thus notice a difference).
I have always considered cables the "final tweak". For me, I needed a balanced cable and the Q is about as ergonomic a cable there is and very musical & detailed. So win-win for me.