I bought this only about a week ago. It comes with travel case and original papers. I believe it is bamboo because it has the pattern around the edge of the cups. I would also trade it for the rev 1 + $200 since I prefer the...
Regarding one side being louder/more dominant... That's a sign of driver failure. If it's not a hearing issue. I had that issue and it got worse...sent it in for repair, took about a month to get it back fixed.