Ah, cable voodoo. The difference between good cables and bad cables is almost always obvious in quality of construction, materials used, and overall performance. However, there's a lot of snake oil out there when it comes to cables, especially in the high end audio/home theater market, where guys will spend thousands on a 3meter interconnect. However, there was a double blind study done a while back in one of the hi-fi mags that tested expensive speaker interconnects against surplus extension cords. And no one could tell the difference in the double blind test! Monster is one of the worst companies when it comes to cable marketing voodoo for the mass market, but they are definitely not the most brazen.
Buy a decent cable, and you'll be OK. You don't need oxygen free, big wires, or any of that crap. What is important is shielding and quality of construction, especially at the ends. And the little extra features like the securing spring in the planet waves cables are nice, but not necessary.
Edited to add that the guitarnuts link from BigG1986 explains it perfectly.