I apologise for taking a while to respond. The music I tend to listen to is very diverse. I'm now tending away from the K550 for the apparent lack of lows and generally not very good for bass. It is now down to the SRH840 and the M50, I would like a decent amount of bass. I listen to a wide variety of music varying from classical to dubstep. I also read something about the durability of the SRH840s not being very good (can someone either advise me on this).Any final advice for deciding between these two cans?
I think if you don't like the K550 because of the lack of bass, you aren't going to like the SRH840 either. Those and especially its successor, the SRH940, are very analytical closed-back cans. If fact, I didn't even really enjoy the K550 and its bass until after I listened to the two Shures. After listening to them, I really appreciated the K550 more.