Hi guys, I currently have the Aviator from Skullcandy. It sounds pretty good with 320kb mp3 and lossless files, with good fidelity & acceptable bass. However, anything lower than 192kb or has bad compression will sound a bit harsh. An alternative I'm looking at is the Sennheiser HD 448, which I can get around $40 cheaper than the Aviator. Unfortunately, my local retailer has to special order these and they have a no-return policy on headphones for sanitary reasons. This basically means I cannot order these to try out. As a result, I'm hoping someone on this forum has used these headphones and could maybe offer up some feedback regarding their sound quality. I listen to a wide range of music (e.g. jazz, rock, classical, and some pop), and I'll be using this headphone on my iPod Classic 160gb without an amp. In terms of bass, I definitely don't want it to overpower the vocals & highs, but neither do I want it to be virtually absent. Should I keep the Aviator or get the HD 448? Thanks!