Well, despite what I said earlier about not buying more (I still am satisfied with my HD 650s), I got an offer to buy someone's Audio Technica AD2000's here for a reasonable price. After reading a lot of reviews about the AD2000, I just couldn't resist, so I bought them from him :).
They'll probably arrive next week. I'm kind of excited, hearing some people really raving about these, and it sound like exactly what I was originally looking for on this thread. The DT880 and AKG702 descriptions just sounded a bit off from what I was looking for, but the AD2000 seemed to fit everything I wanted exactly from descriptions. It remains to be seen how I like them when they arrive but I think I will.
The only possible annoyance would be the drivers pressing against my ears, but what really annoys me is pressure on the top of my head (and pads that squash my ear sideways like the Ultrasone Pro 900) - and both my HD 650 and the AD2000 don't have that problem, so it should be fine.
Edited by ac500 - 9/14/11 at 6:13pm