Ok so I bought the SRH840. Only problem is that the left cup is really uncomfortable (the right side is perfect). Is there any chance that this will go away with time e.g. by wearing them in...? If not it looks like I'm going to have to return them asap. 

Thanks for the replies. I am looking into the SRH840 and I'm liking them a lot. I will check out the AD700's as well.    Does anyone know of a reputable store that sells headphones in the London/Bristol area? It would be great to try them out in person. 

I am completely new to the world of audiophilia and I'm looking to spend around £100 on a pair of headphones. I've browsed loads of threads on these forums and frankly I am more confused than when I started! The good news is that I've realised the error of my ways and am no longer interested in...