Attention budget bassheads: Sonic Electronix has the Sony MDR-XB500 Extra Bass Headphones with 40mm Drivers for $45.99 shipped.
http://www.sonicelectronix.com/item_44268_Sony-MDR-XB500-Extra-Bass-Headphones-with-40mm-Drivers.html
http://www.sonicelectronix.com/item_44268_Sony-MDR-XB500-Extra-Bass-Headphones-with-40mm-Drivers.html