Hello, my birthday is coming up, and im going to be getting some over ear headphones. The two that i am looking at are the shure srh440, and sennheiser hd280 models. What im looking for is headphones that are quite sound proof, i dont like to hear outside noise when im listening to music. id like them to work well in a studio application, and for use with my ipod. I have read places the the srh440 doesn't have a ton of bass, would anyone be able to confirm that? One thing about the srh440's is that the cable is replaceable, the ear cups are too. So which one do you think would be better?