Thank you for your insightful review!
I find the 9's well suited for my pin head. I wear them at least 2 hours a day just commuting. So comfort is not an issue with me.
I listen to heavy metal, classic rock and Rap. At times ,I do find the bass bump to be distracting. Thus I think the 8's might work better. I also own the RPX-33
I think I am having a mental battle with myself. If the 8's are better than the 9's, shouldn' t they be called the 10's?