Wouldn't that be funny if you couldn't buy replacement pads for your $500 headphone? 
I bet there will be a lot of people who will buy the 65th pads for the Q701. I honestly don't know if this would even work.
I just know that the K601 pads are AWFUL on the Q701. Makes them much too shouty and annoying. Not with all music..
At first it was OK, but then I started to hate it.
I'd probably pay up to $75 for some memory foam pads for the Q701...yeah i'm stupid. Only if they were not as bad as K601 pads.