Thanks for your answer Alexander !
So if I understand correctly, and since I think I'm going with CCA then you would recommend me to choose a 14 gauge CCA speaker wire instead of a 16 gauge one right ?
To answer your question the runs won't be long as the most distant speakers (the surround speakers) will be placed at around 4.5 or 6 meters or so from the receiver if I take into consideration running them over my ceiling or doorway I haven't decided yet.
If I'm not going with CCA then which wires would you recommend for a setup like mine ? Also does it make an actual difference to an ''untrained'' ear ?
I just want to get the best from my surround system but I'm also wanting to be reasonable with the price of the cables. Yet at the same time I don't want my choice of cables to ''limit'' my speakers' potential.