Oh I'm sorry
I always vowed not to make that mistake after reading of so many doing so, but there you go.
But still, I thought the main reason the OP enjoyed the Pro900's were for their bass qualities, both these headphones are for different uses.
Comparing the qualities of open-air headphones to closed back is like apples & oranges, isn't it?
Not necessarily. They are all headphones after all, and the PRO 900s leak like an open headphone anyway :P