Sonic Defender
Headphoneus Supremus
Weight is certainly important, no doubt, but I was thinking about sound signature.I actually find that there isn't. One of the main selling points of the GS3000e is that it's a lightweight. The only other full-sized headphones at the $1500-2000 USD price point that don't weigh like a brick are the HD800S, the X5000, and the Ether 2. Audeze/Hifiman/ZMF are absolutely out of the question.
The PS2000e is a heavy monster though, so no comment on that