Haha I will shoot you a PM sooner or later for that list xD including those I have demoed.
Since this is a thread for PSB, here we go;
I love it's SQ. Wide soundstage and amazing imaging for a closed headphones. Very neutral sounding yet the bass extends deep. Pretty well detailed without making anything harsh. If K550 can't fit your head, go for the PSB M4U1 xD