^ Exact same thoughts as Rathlon; love my Pro900s but I'm definitely going to get HE400's, I've been eyeing them for ages.
I think these 2 sets of cans will be perfect compliments to eachother, especially for a basshead. One open with nice mids and great clean bass, the other closed and bassheavy.
Thanks also to you two for some 'chillstep' artist recommendations. I used to be really into deep/technoey dubstep, even DJ'ed it out a bit; Ramadanman/Pearson Sound, Pinch, 2562, Kryptic Minds (dark), Egyptrixx, Western Synthetics (Sydney), loads of others..
I knew of Phaeleh, Mount Kimbie, Mount Eden, Burial and other big ones, but it sounds like 'chillstep' is a bit of a new thing and truly is just about the chill. Lovely stuff.
I highly recommend the Bristol producer Kraymon; he used to make breakbeat (still does) but now also lots of experimental dubby stuff and has his own record label.