After some time off, Sony is once again challenging the top of the headphone market (at least in Japan), first with the MDR-Z1000 fullsize headphones, and now with the MDR-EX1000 headphones. The EX1000 features new 16mm drivers and magnesium enclosures, and includes 10 different eartips to ensure a good fit. Frequency respone is rated at 3Hz - 30KHz. 32 Ohm impedance and 108dB/mW sensitivity should be an easy drive for any portable. Like the Z1000, the EX1000 is currently import only.