So I just picked up the Shure 750DJ's and I was listening to a song that came with Windows 7, Sleep Away by Bob Acri http://www.youtube.com/watch?v=I6PHgtdxFrY Every time the bass hits, especially on the first note in the whole song, I get a crackling noise, I can still return the headphones but...

Can anyone help me out here? I'm stuck between the Shure 750DJ's and the Sennheiser HD280 Pro. The 750DJ's have better specs but the HD280's are better respected. I'm definitely looking for a lot of bass for stuff like dubstep but I do need decent mids and highs because I'll be listening to...