If i would have to pick just one band, it very well might be Linkin Park. They've got the best sound i've ever heard. The combination of leads vocalists Chester Bennington, who sings (and screams), and Mike Shinoda, who has an awesome voice and does rap, makes them sound awesome. Not to forgot the rest of the band, Brad (somethin) is the best guitarist i know of, and the drumist (Rob somthin) is awesome too. Not to mention Pheonix who plays bass, and Joe Hahn who does turntables, samples, beats, and sounds. They're sound is not really explainable. It's kind of a mixture of hard core rock, rap, and just mixes...they've also got a lot of weird but cool intraments from places like Japan. Whatever they've done though, it's awesome. Check em out now at http://www.linkinpark.com .