Here's an odd confession: I just realized that after my HD-650s, my most used headphones are the greatly-maligned HD-570s. The 570s are inefficient, cold, distant cans. Even diehard Senn fanboys don't particularly like them. That said, they're amazingly comfortable, and don't sound any worse driven by my MacBook's heapdhone jack than they do by my GLite. They work quite well with youtube or flash based games like Onslaught 2.