Hmmm... this is getting a bit frustrating now
I keep thinking about the K701s, apparently they are very comforable, and I keep reading good reviews. Mind you they are going to be a bit more expensive than the others. I'm a bit concerned that the HD650s will be a bit too tight on my head - not to the point of making me pass out, but to the point when 'I know I am wearing them'.
Thats one of the things I loved with my Beyer DT431. I was constantly turning around when things were making noises on the PC - I honestly believed that most of the noise were behind me, and could 'forget' I were wearing headphones.
I don't suppose the HD650 will be anywhere near as comfortable. The DT880 / DT990 might be. Probably a bit more review hunting is required
I'm also not sure about what will work best with my amp. The K701 are quite low impedence (apparently 62ohm), so may not even need much amping. I'm just not sure how the tube based Little Dot 2 will affect anything other than the Sennheisers - apparently they come 'set up' for Sennheiser HD600s. I don't want to spend £180 on the headphones and have them end up being incompatible with the amp.
Still, I can always sell the amp. It was cheap enough anyway. I could always get another amp - something solid state.
Here we go - at this rate I'll end up getting 2 pairs of headphones and another amp - rather than just the 1 pair I was intending to buy :D