as far as logos i don't like either of those. but it's amazing how the Rolling Stones logo has become such a recognizable part of pop culture. even if you've never listened to their music you've probably seen this icon somewhere:
also, the whole idea of bands having logos, or brands is interesting. i don't know if it's marketing, or just taking advantage of music being a visual art form now. Jack White's red and white color play is as memorable as a Target commercial, or the experience of walking through the aisles of one of their stores