I'm looking for a pair of good noise cancelling or isolating headphones. I'd settle for good isolation over active cancellation.
Particularly interested in closed-back, over-the-ear models. I'll be sitting at a desk just blocking things out, so looks aren't at all important.
Ideally I'd like something like Beyerdynamic DT150's or Direct Sound EX-29's, but I'd like to keep it to around the £50 mark if possible.
Not really interested in in-ear phones; I have some very decent Shures for that, but not suitable for constantly slipping on and off.
As a guide, I'm using some Sony MDR-XDX200's as a stopgap. I'm perfectly happy with the sound quality, but I'd really like better isolation / comfort. The cups are a bit small for my ears, and the headband digs in a bit.