Haha yeah, I just got the email as well.
Before I go ahead and buy these mahoganies, I was wondering if other users could rank the mahogany, ebony and PH alongside the 610 and 900? Just looking for personal opinions.
Did a little comparison between my TH-600 and a friends TH-X00, I like the TH-600 better, probably due to the stock ear pads of the TH-X00 being very uncomfortable for me and not providing a good seal. This lack of a good seal I think causes some distortion in the bass and may have made the highs a bit harsh/strange compared to the TH-600. When I tried my friends TH-900 last year it was a little smoother in the highs but needed better gear to notice the differences and the bass was a touch warmer but seemed slower.