There's always these from Superlux: [url="http://www.thomann.de/gb/superlux_hd662_f.htm"]http://www.thomann.de/gb/superlux_hd662_f.htm[/url]. Only £28 plus postage (around £7-8). Now that sounds too cheap for studio quality headphones but these reproduce sounds, especially bass, almost identically to my M-Audio BX5a studio reference monitors. A bit of research that my mate did revealed that Superlux make components for the likes of AKG, BeyerDynamics etc. (Although I'm not sure if they make them for those two brands, but they make them for brands of that calibre.) These are closed back and noise cancelling. I get snuck up on all the time when I'm wearing them...