Just to be clear, I think those who find Audeze phones heavy for regular use just have extraordinarily weak necks or something. It's not light, but it's definitely not heavy enough to make it uncomfortable. As a matter of fact, I find it very comfortable. The cups are very comfortable and snug to your ears and around it.
+1 Once had my LCD3 on for 8 hours straight (Was watching movies, then switched to playing online games). Got up and drove out to have dinner with my girlfriend. Was feeling fine.