I need to pick up a new set of headphones for work, I'm spending the theater's money, not my own. I know the Sony MDR 7506 has been the industry standard for a long time, but for $25 more I can get the 7510's. Larger drivers, greater frequency response, can handle twice as much power. To me that all adds up to spending the extra $25, but I've never listened to the 7510's. Is there any reason I shouldn't go with the 7510's?