Yeah, actually you sound like somebody who probably rides just fine with music, because you ride very fast :) I've definitely noticed that the faster you go, the safer it is w/r/t people hitting you from behind, and if you just need to look out for people in front of you, you probably don't need to hear anything. When I used to go really, really fast on my freeride board, I rode with tunes a few times (quit because it was inconvenient more than anything), and never felt unsafe - If somebody else passes you while you're going 40 mph, they don't expect that you can hear anything besides rushing wind anyways. Now that I'm on my carving board and making lots of slower turns across the entire run, I definitely feel like I need to be very aware of my environment.