You might try Analysis Plus Oval cables. People rave about the bass from these wires. They even have a CL3 rated in-wall cable for surround applications. Silver Sonic T-14 is another high value/performance wire.
Cables/Wires will make a difference. The more your system can resolve the more differences you will hear.
Sub and surround speaker placement and proper calibration will have more of an affect than your wire. Get that right first. It's cheaper than buying new cables. Also, if your surround speakers don't sonically match the fronts then spending money on speaker wire may not be your first priority.
Stewart
Cables/Wires will make a difference. The more your system can resolve the more differences you will hear.
Sub and surround speaker placement and proper calibration will have more of an affect than your wire. Get that right first. It's cheaper than buying new cables. Also, if your surround speakers don't sonically match the fronts then spending money on speaker wire may not be your first priority.
Stewart