Are the Darth Beyers to closed guitar heavy rock and metal headphones as Grados are to open rock and metal phones? Are they controversial...or are people really seeing a wonderous change from stock into awesome audiophile quality rock phones? Even at 80 ohms...or are people opting for the 300 or even 600 ohm variety. For my headphone collection I am looking for the ultimate closed hard rock/metal phone for home use ( long cable and amp ). I also plan on getting SR 325is as well for open phones.