generic cables are fine unless your wires are tie wrapped to high tension power lines, in which case you'de better rethink your situation anyways. The signal voltages used by audio equipment are well over the voltages you would pick up from running a normal cable, let alone a shielded one.
buy monster cable!!!(not) haha sorry i used to work for circuit city, they were always pushing us to sell monster cable cuz they made a lot of profit off it. We wern't even supposed to show them the cheapie cables unless they outright refused to buy monster cable. The sad truth of it is, monster cable is a complete ripoff but we still got 4/5 of people to buy it.