I'm really enjoying the way this thread is progressing as well. I've had my setup for some years now & I love my dt880s as well & feeling a similar itch for something just as analytical that doesn't give up anything to the 880s. But looking for a bit funner sounding(engadging) & maybe some more bass extension & depth.( I thought my previous HD600s were a bit funner before & less analytical to the DT880s) I have AD700, closed M50s & Ultrasones 580s but not looking for anything like that. I think I'm leaning towards the X2's over the K712s thanks to this thread. I feel torn because the QC issues tell me I should opt for the AKG. I can assume you still enjoy the X2s after your experience with the T1, 1990s? I got a bottlehead crack amp & a Maverick D1 amp.